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Steffek GL, Grommes AS, Hanks LM, Mitchell RF. (R)-(+)-γ-Decalactone is Conserved in North America as a Pheromone Component of Osmoderma eremicola (Coleoptera: Scarabaeidae) and a Kairomone of Elater abruptus (Coleoptera: Elateridae). J Chem Ecol 2024; 50:122-128. [PMID: 38388901 DOI: 10.1007/s10886-024-01475-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2023] [Revised: 01/31/2024] [Accepted: 02/06/2024] [Indexed: 02/24/2024]
Abstract
The scarab genus Osmoderma (Coleoptera: Scarabaeidae) includes several large species called hermit beetles that develop within dead and decaying hardwood trees. Males of at least three Palearctic species produce the aggregation-sex pheromone (R)-(+)-γ-decalactone, including the endangered O. eremita (Scopoli). However, hermit beetles have received less attention in the western hemisphere, resulting in a large gap in our knowledge of the chemical ecology of Nearctic species. Here, we identify (R)-( +)-γ-decalactone as the primary component of the aggregation-sex pheromone of the North American species Osmoderma eremicola (Knoch). Field trials at sites in Wisconsin and Illinois revealed that both sexes were attracted to lures containing (R)-(+)-γ-decalactone or the racemate, but only males of O. eremicola produced the pheromone in laboratory bioassays, alongside an occasional trace of the chain-length analog γ-dodecalactone. Females of the congener O. scabra (Palisot de Beauvois) were also significantly attracted by γ-decalactone, suggesting further conservation of the pheromone, as were females of the click beetle Elater abruptus Say (Coleoptera: Elateridae), suggesting that this compound may have widespread kairomonal activity. Further research is needed to explore the behavioral roles of both lactones in mediating behavioral and ecological interactions among these beetle species.
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Affiliation(s)
- Geryd L Steffek
- Department of Biology, University of Wisconsin Oshkosh, 800 Algoma Blvd., Oshkosh, WI, 54901, USA
| | - Anna S Grommes
- Department of Entomology, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
- Corteva Agriscience, Johnston, IA, 50131, USA
| | - Lawrence M Hanks
- Department of Entomology, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
| | - Robert F Mitchell
- Department of Biology, University of Wisconsin Oshkosh, 800 Algoma Blvd., Oshkosh, WI, 54901, USA.
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Lo WHK, Laurencin CT. Adopt-A-Classroom Program: A Potential Platform to Address the Root of Health Disparities in the US. J Racial Ethn Health Disparities 2024:10.1007/s40615-024-01990-6. [PMID: 38558148 DOI: 10.1007/s40615-024-01990-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Revised: 03/20/2024] [Accepted: 03/22/2024] [Indexed: 04/04/2024]
Abstract
The underrepresentation of Black doctors is a significant issue in the US that led to the perpetuation of health disparities in the African American community. Racial and ethnic minorities in the US have been shown to have higher rates of chronic diseases, such as hypertension, diabetes, and cardiovascular disease, as well as higher rates of obesity and premature death compared to White people. While Blacks make up more than 13% of the US population, they comprise only 4% of US doctors and less than 7% of medical students. It is believed that this problem requires more deliberate efforts by policymakers and the educational establishment, not only at the undergraduate and medical school level, but earlier in the educational "pipeline"-the K-12 school system. While the medical field is rooted in Science, Technology, Engineering, and Mathematics (STEM), we have launched a new initiative that will provide year-round STEM development activities for K-12 education in Connecticut in Hartford and Waterbury districts, especially among populations with health disparities.
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Affiliation(s)
- Wai Hong Kevin Lo
- The Cato T. Laurencin Institute for Regenerative Engineering, University of Connecticut, Storrs, CT, 06268, USA
| | - Cato T Laurencin
- The Cato T. Laurencin Institute for Regenerative Engineering, University of Connecticut, Storrs, CT, 06268, USA.
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3
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McDaniel J, Krimm H, Schuele CM. SLPs' perceptions of language learning myths about children who are DHH. J Deaf Stud Deaf Educ 2024; 29:245-257. [PMID: 37742092 PMCID: PMC10950421 DOI: 10.1093/deafed/enad043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2023] [Revised: 06/30/2023] [Accepted: 08/23/2023] [Indexed: 09/25/2023]
Abstract
This article reports on speech-language pathologists' (SLPs') knowledge related to myths about spoken language learning of children who are deaf and hard of hearing (DHH). The broader study was designed as a step toward narrowing the research-practice gap and providing effective, evidence-based language services to children. In the broader study, SLPs (n = 106) reported their agreement/disagreement with myth statements and true statements (n = 52) about 7 clinical topics related to speech and language development. For the current report, participant responses to 7 statements within the DHH topic were analyzed. Participants exhibited a relative strength in bilingualism knowledge for spoken languages and a relative weakness in audiovisual integration knowledge. Much individual variation was observed. Participants' responses were more likely to align with current evidence about bilingualism if the participants had less experience as an SLP. The findings provide guidance on prioritizing topics for speech-language pathology preservice and professional development.
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Affiliation(s)
- Jena McDaniel
- Department of Hearing and Speech Sciences, Vanderbilt University School of Medicine, Nashville, United States
| | - Hannah Krimm
- Department of Communication Sciences and Special Education, University of Georgia, Athens, United States
| | - C Melanie Schuele
- Department of Hearing and Speech Sciences, Vanderbilt University School of Medicine, Nashville, United States
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4
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Nygaard MA, Renshaw TL, Ormiston HE, Komer J, Matthews A. Importance, quality, and engagement: School mental health providers' perceptions regarding within-district transition care coordination practices. Sch Psychol 2023:2024-04606-001. [PMID: 37668585 DOI: 10.1037/spq0000569] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/06/2023]
Abstract
Although care coordination (CC; i.e., the organization of care activities between professionals to facilitate appropriate service delivery; McDonald et al., 2007) has yet to be studied extensively within schools, preliminary research suggests coordinating school mental health supports can be beneficial (Francis et al., 2021) and that interprofessional and interagency collaboration is warranted to meet student needs (McClain et al., 2022). We examined the perceptions of school mental health providers (SMHPs) regarding importance, quality, and engagement with within-district transition CC practices within a multitiered system of support framework. Participants were 163 SMHPs who endorsed being involved in designing, providing, or implementing mental health services in a U.S. school district. The three scales used to measure engagement with CC practices were based on the Care Coordination Measures Atlas (McDonald et al., 2014) and were found to have promising preliminary psychometrics. Descriptive statistics indicated SMHPs endorsed CC as very important but perceived school and district personnel to view it as less important, reported their own quality of CC was slightly above that of their school and district, and regularly engaged in broad CC practices. Moreover, bivariate correlations indicated SMHP's personal views of CC importance were not associated with the quality of school and district CC, yet engagement in broad CC activities was associated with transition facilitation practices, and attitudes about CC were associated with engagement in broad CC activities. Implications of findings are discussed. (PsycInfo Database Record (c) 2023 APA, all rights reserved).
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Affiliation(s)
- Malena A Nygaard
- Department of Counseling and Educational Psychology, School of Education, Indiana University Bloomington
| | | | - Heather E Ormiston
- Department of Counseling and Educational Psychology, School of Education, Indiana University Bloomington
| | - Jack Komer
- Department of Counseling and Educational Psychology, School of Education, Indiana University Bloomington
| | - Austin Matthews
- Department of Counseling and Educational Psychology, School of Education, Indiana University Bloomington
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5
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Sy VT, Boone EC, Xiao H, Vierling MM, Schmitz SF, Ung Q, Trawick SS, Hammond TM, Shiu PKT. A DEAD-box RNA helicase mediates meiotic silencing by unpaired DNA. G3 (Bethesda) 2023; 13:jkad083. [PMID: 37052947 PMCID: PMC10411587 DOI: 10.1093/g3journal/jkad083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Revised: 03/22/2023] [Accepted: 04/03/2023] [Indexed: 04/14/2023]
Abstract
During the sexual phase of Neurospora crassa, unpaired genes are subject to a silencing mechanism known as meiotic silencing by unpaired DNA (MSUD). MSUD targets the transcripts of an unpaired gene and utilizes typical RNA interference factors for its process. Using a reverse genetic screen, we have identified a meiotic silencing gene called sad-9, which encodes a DEAD-box RNA helicase. While not essential for vegetative growth, SAD-9 plays a crucial role in both sexual development and MSUD. Our results suggest that SAD-9, with the help of the SAD-2 scaffold protein, recruits the SMS-2 Argonaute to the perinuclear region, the center of MSUD activity.
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Affiliation(s)
- Victor T Sy
- Division of Biological Sciences, University of Missouri, Columbia, MO 65211, USA
| | - Erin C Boone
- Division of Biological Sciences, University of Missouri, Columbia, MO 65211, USA
| | - Hua Xiao
- Division of Biological Sciences, University of Missouri, Columbia, MO 65211, USA
| | - Michael M Vierling
- Division of Biological Sciences, University of Missouri, Columbia, MO 65211, USA
| | - Shannon F Schmitz
- Division of Biological Sciences, University of Missouri, Columbia, MO 65211, USA
| | - Quiny Ung
- Division of Biological Sciences, University of Missouri, Columbia, MO 65211, USA
| | - Sterling S Trawick
- Division of Biological Sciences, University of Missouri, Columbia, MO 65211, USA
| | - Thomas M Hammond
- School of Biological Sciences, Illinois State University, Normal, IL 61790, USA
| | - Patrick K T Shiu
- Division of Biological Sciences, University of Missouri, Columbia, MO 65211, USA
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Prestianni L, Espinal ER, Hathcock SF, Vollmuth N, Wang P, Holler RA, Liu S, Kim BJ, Bao Y. Synthesis and Characterization of Quercetin-Iron Complex Nanoparticles for Overcoming Drug Resistance. Pharmaceutics 2023; 15:pharmaceutics15041041. [PMID: 37111527 PMCID: PMC10144594 DOI: 10.3390/pharmaceutics15041041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Revised: 02/16/2023] [Accepted: 03/17/2023] [Indexed: 04/29/2023] Open
Abstract
Quercetin, one of the major natural flavonoids, has demonstrated great pharmacological potential as an antioxidant and in overcoming drug resistance. However, its low aqueous solubility and poor stability limit its potential applications. Previous studies suggest that the formation of quercetin-metal complexes could increase quercetin stability and biological activity. In this paper, we systematically investigated the formation of quercetin-iron complex nanoparticles by varying the ligand-to-metal ratios with the goal of increasing the aqueous solubility and stability of quercetin. It was found that quercetin-iron complex nanoparticles could be reproducibly synthesized with several ligand-to-iron ratios at room temperature. The UV-Vis spectra of the nanoparticles indicated that nanoparticle formation greatly increased the stability and solubility of quercetin. Compared to free quercetin, the quercetin-iron complex nanoparticles exhibited enhanced antioxidant activities and elongated effects. Our preliminary cellular evaluation suggests that these nanoparticles had minimal cytotoxicity and could effectively block the efflux pump of cells, indicating their potential for cancer treatment.
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Affiliation(s)
- Lucas Prestianni
- Chemical and Biological Engineering, The University of Alabama, Tuscaloosa, AL 35487, USA
| | - Eric R Espinal
- Department of Biological Sciences, The University of Alabama, Tuscaloosa, AL 35487, USA
| | - Sarah F Hathcock
- Department of Biological Sciences, The University of Alabama, Tuscaloosa, AL 35487, USA
| | - Nadine Vollmuth
- Department of Biological Sciences, The University of Alabama, Tuscaloosa, AL 35487, USA
| | - Pixiang Wang
- Department of Chemistry and Physics, Center for Materials and Manufacturing Sciences, Troy University, Troy, AL 36082, USA
| | - Robert A Holler
- Alabama Analytical Research Center, The University of Alabama, Tuscaloosa, AL 35487, USA
| | - Shaoyang Liu
- Department of Chemistry and Physics, Center for Materials and Manufacturing Sciences, Troy University, Troy, AL 36082, USA
| | - Brandon J Kim
- Department of Biological Sciences, The University of Alabama, Tuscaloosa, AL 35487, USA
- Department of Microbiology, Heersink School of Medicine, The University of Alabama at Birmingham, Birmingham, AL 35487, USA
- Center for Convergent Biosciences and Medicine, The University of Alabama, Tuscaloosa, AL 35487, USA
- Alabama Life Research Institute, The University of Alabama, Tuscaloosa, AL 35487, USA
| | - Yuping Bao
- Chemical and Biological Engineering, The University of Alabama, Tuscaloosa, AL 35487, USA
- Center for Convergent Biosciences and Medicine, The University of Alabama, Tuscaloosa, AL 35487, USA
- Alabama Life Research Institute, The University of Alabama, Tuscaloosa, AL 35487, USA
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7
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Skaist Mehlman T, Biel JT, Azeem SM, Nelson ER, Hossain S, Dunnett L, Paterson NG, Douangamath A, Talon R, Axford D, Orins H, von Delft F, Keedy DA. Room-temperature crystallography reveals altered binding of small-molecule fragments to PTP1B. eLife 2023; 12:84632. [PMID: 36881464 PMCID: PMC9991056 DOI: 10.7554/elife.84632] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Accepted: 02/12/2023] [Indexed: 03/08/2023] Open
Abstract
Much of our current understanding of how small-molecule ligands interact with proteins stems from X-ray crystal structures determined at cryogenic (cryo) temperature. For proteins alone, room-temperature (RT) crystallography can reveal previously hidden, biologically relevant alternate conformations. However, less is understood about how RT crystallography may impact the conformational landscapes of protein-ligand complexes. Previously, we showed that small-molecule fragments cluster in putative allosteric sites using a cryo crystallographic screen of the therapeutic target PTP1B (Keedy et al., 2018). Here, we have performed two RT crystallographic screens of PTP1B using many of the same fragments, representing the largest RT crystallographic screens of a diverse library of ligands to date, and enabling a direct interrogation of the effect of data collection temperature on protein-ligand interactions. We show that at RT, fewer ligands bind, and often more weakly - but with a variety of temperature-dependent differences, including unique binding poses, changes in solvation, new binding sites, and distinct protein allosteric conformational responses. Overall, this work suggests that the vast body of existing cryo-temperature protein-ligand structures may provide an incomplete picture, and highlights the potential of RT crystallography to help complete this picture by revealing distinct conformational modes of protein-ligand systems. Our results may inspire future use of RT crystallography to interrogate the roles of protein-ligand conformational ensembles in biological function.
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Affiliation(s)
- Tamar Skaist Mehlman
- Structural Biology Initiative, CUNY Advanced Science Research CenterNew YorkUnited States
- PhD Program in Biochemistry, CUNY Graduate CenterNew YorkUnited States
| | - Justin T Biel
- Department of Bioengineering and Therapeutic Sciences, University of California, San FranciscoSan FranciscoUnited States
| | - Syeda Maryam Azeem
- Structural Biology Initiative, CUNY Advanced Science Research CenterNew YorkUnited States
| | | | - Sakib Hossain
- Structural Biology Initiative, CUNY Advanced Science Research CenterNew YorkUnited States
| | - Louise Dunnett
- Diamond Light SourceDidcotUnited Kingdom
- Research Complex at Harwell, Harwell Science and Innovation CampusDidcotUnited Kingdom
| | | | - Alice Douangamath
- Diamond Light SourceDidcotUnited Kingdom
- Research Complex at Harwell, Harwell Science and Innovation CampusDidcotUnited Kingdom
| | | | | | - Helen Orins
- Structural Biology Initiative, CUNY Advanced Science Research CenterNew YorkUnited States
| | - Frank von Delft
- Diamond Light SourceDidcotUnited Kingdom
- Research Complex at Harwell, Harwell Science and Innovation CampusDidcotUnited Kingdom
- Centre for Medicines Discovery, Nuffield Department of Medicine, University of OxfordOxfordUnited Kingdom
- Department of Biochemistry, University of JohannesburgJohannesburgSouth Africa
| | - Daniel A Keedy
- Structural Biology Initiative, CUNY Advanced Science Research CenterNew YorkUnited States
- Department of Chemistry and Biochemistry, City College of New YorkNew YorkUnited States
- PhD Programs in Biochemistry, Biology, and Chemistry, CUNY Graduate CenterNew YorkUnited States
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8
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Haegele JA, Sun F, Li C, Ng K, Lee J, Chee Ang SH, Alves MLT, Yang H, Wu Y, Tan JSY, Rintala P, Huang WY, Healy S, Dos Santos Alves I, Schliemann AL, Maeng H, Karna E, Ding D. Environmental Correlates of Physical Activity and Screen-Time in Youth with Autism Spectrum Disorder: A Seven-Country Observational Study. J Autism Dev Disord 2023:10.1007/s10803-023-05918-7. [PMID: 36849839 PMCID: PMC9970125 DOI: 10.1007/s10803-023-05918-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/01/2023] [Indexed: 03/01/2023]
Abstract
This cross-sectional observational study sought to examine the environmental correlates of physical activity and screen-time among youth with autism spectrum disorder (ASD). Parents of youth with ASD (n = 1,165) from seven countries/regions provided responses to an online survey form measuring environmental correlates (i.e., physical activity neighborhood environment, social network, social trust and cohesion, bedroom media, social home environment) and outcomes (i.e., physical activity, screen-time). Multiple linear regression analyses were conducted to determine environmental predictors of the outcomes. Physical activity neighborhood environment (B = 0.15, p = 0.047), social network (B = 0.16, p = 0.02), and social home environment (B = 1.07, p < 0.001) were significantly associated with physical activity, whereas social trust and cohesion and bedroom media were not. Further, social trust and cohesion (B = -0.14, p = 0.001), bedroom media (B = 0.10, p = 0.001), and social home environment (B = -0.16, p < 0.001) were significantly associated with screen-time while neighborhood environment and social network were not. The identified environmental attributes of physical activity and screen-time behaviors should be targeted for health promotion among youth with ASD.
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Affiliation(s)
- Justin A Haegele
- Department of Human Movement Sciences, Old Dominion University, Norfolk, USA
- Center for Movement, Health, & Disability, Old Dominion University, Norfolk, USA
| | - Fenghua Sun
- Department of Health and Physical Education, The Education University of Hong Kong, Hong Kong SAR, China
| | - Chunxiao Li
- School of Physical Education & Sports Science, South China Normal University, 51006, Guangzhou, China.
- Adapted Physical Activity + Laboratory, South China Normal University, Guangzhou, China.
| | - Kwok Ng
- Physical Activity for Health Research Cluster, Department of Physical Education and Sport Sciences, University of Limerick, Limerick, Finland
- Faculty of Education, University of Turku, Turku, Finland
- School of Educational Sciences and Psychology, University of Eastern Finland, Kuopio, Finland
| | - Jihyun Lee
- Department of Kinesiology, San José State University, San Jose, USA
| | | | | | - Hannah Yang
- Department of Adapted Physical Education, Baekseok University, Cheonan, South Korea
| | - Yandan Wu
- School of Physical Education & Sports Science, Fujian Normal University, Fuzhou, China
| | - Jernice Sing Yee Tan
- School of Sports, Health and Leisure, Republic Polytechnic, Singapore, Singapore
| | - Pauli Rintala
- Faculty of Sport and Health Sciences, University of Jyväskylä, Jyväskylä, Finland
| | - Wendy Yajun Huang
- Department of Sport, Physical Education and Health, Hong Kong Baptist University, Hong Kong SAR, China
| | - Sean Healy
- School of Nursing, Psychotherapy and Community Health, Dublin City University, Dublin, Ireland
| | | | | | - Hyokju Maeng
- College of Education & Human Development, Georgia State University, Atlanta, USA
| | - Eija Karna
- School of Educational Sciences and Psychology, University of Eastern Finland, Kuopio, Finland
| | - Ding Ding
- Sydney School of Public Health, The University of Sydney, Melbourne, Australia
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Yonemoto G, Kashani M, Benoit EB, Weiss JJ, Barbosa P. Changing Answers in Multiple-Choice Exam Questions: Patterns of TOP-Tier Versus BOTTOM-Tier Students in Podiatric Medical School. J Med Educ Curric Dev 2023; 10:23821205231179312. [PMID: 37324049 PMCID: PMC10265327 DOI: 10.1177/23821205231179312] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/22/2022] [Accepted: 05/15/2023] [Indexed: 06/17/2023]
Abstract
OBJECTIVES Students often express uncertainty regarding changing their answers on multiple choice tests despite multiple studies quantitatively showing the benefits of changing answers. METHODS Data was collected from 86 first-year podiatric medical students over one semester for the course of Biochemistry, as shown in electronic testing data collected via ExamSoft's® Snapshot Viewer. Quantitative analysis was performed comparing frequency of changing answers and whether students changed their answers from incorrect-to-correct, correct-to-incorrect, or incorrect-to-incorrect. A correlation analysis was performed to assess the relationship between the frequency of each type of answer change and class rank. Independent-sample t-tests were used to assess differences in the pattern of changing answers amongst the top and bottom performing students in the class. RESULTS The correlation between total changes made from correct-to-incorrect per total answer changes and class rank yielded a positive correlation of r = 0.218 (P = .048). There was also a positive correlation of r = 0.502 (P < .000) observed in the number of incorrect-to-incorrect answer changes per total changes made compared to class rank. A negative correlation of r = -0.382 (P < .000) was observed when comparing class rank and the number of changed answers from incorrect-to-correct. While most of the class benefited from changing answers, a significant positive correlation of r = 0.467 (P < .000) for percent ultimately incorrect (regardless of number of changes) and class rank was observed. CONCLUSION Analysis revealed that class rank correlated to likelihood of a positive gain from changing answers. Higher ranking students were more likely to gain points from changing their answer compared to lower ranking. Top students changed answers less frequently and changed answers to an ultimately correct answer more often, while bottom students changed answers from an incorrect answer to another incorrect answer more frequently than top students.
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Affiliation(s)
- Grant Yonemoto
- Yale Podiatric Medicine and Surgical Residency Program, Yale New Haven Health, New Haven, CT, USA
| | | | - Erica B Benoit
- School of Health and Sciences, Universidad del Sagrado Corazon, San Juan, PR
| | | | - Peter Barbosa
- American University of the Caribbean School of Medicine, Cupecoy, Sint Maarten
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10
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Chopski SG, Govender K, May A, Garven E, Stevens RM, Tchantchaleishvili V, Throckmorton AL. Novel hybrid total artificial heart with integrated oxygenator. J Card Surg 2022; 37:5172-5186. [PMID: 36403254 PMCID: PMC9812888 DOI: 10.1111/jocs.17210] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Revised: 10/30/2022] [Accepted: 11/01/2022] [Indexed: 11/21/2022]
Abstract
There continues to be an unmet therapeutic need for an alternative treatment strategy for respiratory distress and lung disease. We are developing a portable cardiopulmonary support system that integrates an implantable oxygenator with a hybrid, dual-support, continuous-flow total artificial heart (TAH). The TAH has a centrifugal flow pump that is rotating about an axial flow pump. By attaching the hollow fiber bundle of the oxygenator to the base of the TAH, we establish a new cardiopulmonary support technology that permits a patient to be ambulatory during usage. In this study, we investigated the design and improvement of the blood flow pathway from the inflow-to-outflow of four oxygenators using a mathematical model and computational fluid dynamics (CFD). Pressure loss and gas transport through diffusion were examined to assess oxygenator design. The oxygenator designs led to a resistance-driven pressure loss range of less than 35 mmHg for flow rates of 1-7 L/min. All of the designs met requirements. The configuration having an outside-to-inside blood flow direction was found to have higher oxygen transport. Based on this advantageous flow direction, two designs (Model 1 and 3) were then integrated with the axial-flow impeller of the TAH for simulation. Flow rates of 1-7 L/min and speeds of 10,000-16,000 RPM were analyzed. Blood damage studies were performed, and Model 1 demonstrated the lowest potential for hemolysis. Future work will focus on developing and testing a physical prototype for integration into the new cardiopulmonary assist system.
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Affiliation(s)
- Steven G. Chopski
- BioCirc Research Laboratory, School of Biomedical Engineering, Science and Health Systems, Drexel University, Philadelphia, Pennsylvania, USA
| | - Krianthan Govender
- BioCirc Research Laboratory, School of Biomedical Engineering, Science and Health Systems, Drexel University, Philadelphia, Pennsylvania, USA
| | - Alexandra May
- Department of Bioengineering, McGowan Institute for Regenerative Medicine, Swanson School of Engineering, University, Pittsburgh, Pennsylvania, USA
| | - Ellen Garven
- BioCirc Research Laboratory, School of Biomedical Engineering, Science and Health Systems, Drexel University, Philadelphia, Pennsylvania, USA
| | - Randy M. Stevens
- College of Medicine, St. Christopher’s Hospital for Children, Drexel University, Philadelphia, Pennsylvania, USA
| | | | - Amy L. Throckmorton
- BioCirc Research Laboratory, School of Biomedical Engineering, Science and Health Systems, Drexel University, Philadelphia, Pennsylvania, USA
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11
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Reis SM, Gelbar NW, Madaus JW. Understanding the Academic Success of Academically Talented College Students with Autism Spectrum Disorders. J Autism Dev Disord 2021; 52:4426-4439. [PMID: 34676485 PMCID: PMC9508198 DOI: 10.1007/s10803-021-05290-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/09/2021] [Indexed: 11/25/2022]
Abstract
Little is known about the academic and extra-curricular experiences of academically talented students with Autism Spectrum Disorder (ASD). This study focused on how these capable students with ASD successfully navigated and completed high school, and specifically, the experiences that enabled them to attend competitive colleges. Using comparative case studies and directed content analysis, data were derived from semi-structured interviews with 40 students who had been identified as academically talented with ASD, and were enrolled in, or recently graduated from, highly competitive colleges in the United States. The majority were identified as having academic talents, participated in challenging honors classes, enrichment opportunities, interest-based extra-curricular activities, residential summer programs, and pursued other advanced educational experiences. Implications for educational and talent development services are included.
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Affiliation(s)
- Sally M Reis
- Department of Educational Psychology, Neag School of Education, University of Connecticut, 2131 Hillside Road, Unit 3007, Storrs, Mansfield, CT, 06269-3064, USA.
| | - Nicholas W Gelbar
- Department of Educational Psychology, Neag School of Education, University of Connecticut, 2131 Hillside Road, Unit 3007, Storrs, Mansfield, CT, 06269-3064, USA
| | - Joseph W Madaus
- Department of Educational Psychology, Neag School of Education, University of Connecticut, 2131 Hillside Road, Unit 3007, Storrs, Mansfield, CT, 06269-3064, USA
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Johnstun JA, Shankar V, Mokashi SS, Sunkara LT, Ihearahu UE, Lyman RL, Mackay TFC, Anholt RRH. Functional Diversification, Redundancy, and Epistasis among Paralogs of the Drosophila melanogaster Obp50a-d Gene Cluster. Mol Biol Evol 2021; 38:2030-2044. [PMID: 33560417 PMCID: PMC8097280 DOI: 10.1093/molbev/msab004] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Large multigene families, such as the insect odorant-binding proteins (OBPs), are thought to arise through functional diversification after repeated gene duplications. Whereas many OBPs function in chemoreception, members of this family are also expressed in tissues outside chemosensory organs. Paralogs of the Obp50 gene cluster are expressed in metabolic and male reproductive tissues, but their functions and interrelationships remain unknown. Here, we report the genetic dissection of four members of the Obp50 cluster, which are in close physical proximity without intervening genes. We used CRISPR technology to excise the entire cluster while introducing a PhiC31 reintegration site to reinsert constructs in which different combinations of the constituent Obp genes were either intact or rendered inactive. We performed whole transcriptome sequencing and assessed sexually dimorphic changes in transcript abundances (transcriptional niches) associated with each gene-edited genotype. Using this approach, we were able to estimate redundancy, additivity, diversification, and epistasis among Obp50 paralogs. We analyzed the effects of gene editing of this cluster on organismal phenotypes and found a significant skewing of sex ratios attributable to Obp50a, and sex-specific effects on starvation stress resistance attributable to Obp50d. Thus, there is functional diversification within the Obp50 cluster with Obp50a contributing to development and Obp50d to stress resistance. The deletion-reinsertion approach we applied to the Obp50 cluster provides a general paradigm for the genetic dissection of paralogs of multigene families.
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Affiliation(s)
- Joel A Johnstun
- Department of Biological Sciences, Program in Genetics and W.M. Keck Center for Behavioral Biology, North Carolina State University, Raleigh, NC, USA
| | - Vijay Shankar
- Department of Genetics and Biochemistry and Center for Human Genetics, Clemson University, Greenwood, SC, USA
| | - Sneha S Mokashi
- Department of Biological Sciences, Program in Genetics and W.M. Keck Center for Behavioral Biology, North Carolina State University, Raleigh, NC, USA
- Department of Genetics and Biochemistry and Center for Human Genetics, Clemson University, Greenwood, SC, USA
| | - Lakshmi T Sunkara
- Department of Genetics and Biochemistry and Center for Human Genetics, Clemson University, Greenwood, SC, USA
| | - Ugonna E Ihearahu
- Department of Genetics and Biochemistry and Center for Human Genetics, Clemson University, Greenwood, SC, USA
- Faculty of Health and Medical Sciences, University of Surrey, Guildford, United Kingdom
| | - Roberta L Lyman
- Department of Genetics and Biochemistry and Center for Human Genetics, Clemson University, Greenwood, SC, USA
| | - Trudy F C Mackay
- Department of Biological Sciences, Program in Genetics and W.M. Keck Center for Behavioral Biology, North Carolina State University, Raleigh, NC, USA
- Department of Genetics and Biochemistry and Center for Human Genetics, Clemson University, Greenwood, SC, USA
| | - Robert R H Anholt
- Department of Biological Sciences, Program in Genetics and W.M. Keck Center for Behavioral Biology, North Carolina State University, Raleigh, NC, USA
- Department of Genetics and Biochemistry and Center for Human Genetics, Clemson University, Greenwood, SC, USA
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13
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Brower RL, Nix AN, Daniels H, Hu X, Jones TB, Hu S. A Pedagogy of Preparation: Helping Underprepared Students Succeed in College-Level Coursework in Community Colleges. Innov High Educ 2021; 46:153-170. [PMID: 34720385 PMCID: PMC8550095 DOI: 10.1007/s10755-020-09531-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 11/05/2020] [Indexed: 06/13/2023]
Abstract
This paper presents an overall educational philosophy of working with students underprepared for college-level work, which we term "a pedagogy of preparation." We consider how instructors scaffolded instruction to foster college readiness in students who were now able to enroll in college-level work regardless of academic preparation after state-level legislation (SB 1720) that dramatically altered the delivery of developmental education in the Florida College System (FCS). We also consider how collaboration increased among campus personnel after the legislation to foster college readiness in students underprepared for college-level work.
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Affiliation(s)
- Rebecca L. Brower
- Center for Postsecondary Success, Florida State University, Tallahassee, FL 32306-4452 USA
| | - Amanda N. Nix
- Center for Postsecondary Success, Florida State University, Tallahassee, FL 32306-4452 USA
| | - Hollie Daniels
- Center for Postsecondary Success, Florida State University, Tallahassee, FL 32306-4452 USA
| | - Xinye Hu
- Center for Postsecondary Success, Florida State University, Tallahassee, FL 32306-4452 USA
| | - Tamara Bertrand Jones
- Center for Postsecondary Success, Florida State University, Tallahassee, FL 32306-4452 USA
| | - Shouping Hu
- Center for Postsecondary Success, Florida State University, Tallahassee, FL 32306-4452 USA
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14
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Fu DJ, De Micheli AJ, Bidarimath M, Ellenson LH, Cosgrove BD, Flesken-Nikitin A, Nikitin AY. Cells expressing PAX8 are the main source of homeostatic regeneration of adult mouse endometrial epithelium and give rise to serous endometrial carcinoma. Dis Model Mech 2020; 13:dmm047035. [PMID: 32998907 PMCID: PMC7648606 DOI: 10.1242/dmm.047035] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Accepted: 09/15/2020] [Indexed: 01/04/2023] Open
Abstract
Humans and mice have cyclical regeneration of the endometrial epithelium. It is expected that such regeneration is ensured by tissue stem cells, but their location and hierarchy remain debatable. A number of recent studies have suggested the presence of stem cells in the mouse endometrial epithelium. At the same time, it has been reported that this tissue can be regenerated by stem cells of stromal/mesenchymal or bone marrow cell origin. Here, we describe a single-cell transcriptomic atlas of the main cell types of the mouse uterus and epithelial subset transcriptome and evaluate the contribution of epithelial cells expressing the transcription factor PAX8 to the homeostatic regeneration and malignant transformation of adult endometrial epithelium. According to lineage tracing, PAX8+ epithelial cells are responsible for long-term maintenance of both luminal and glandular epithelium. Furthermore, multicolor tracing shows that individual glands and contiguous areas of luminal epithelium are formed by clonal cell expansion. Inactivation of the tumor suppressor genes Trp53 and Rb1 in PAX8+ cells, but not in FOXJ1+ cells, leads to the formation of neoplasms with features of serous endometrial carcinoma, one of the most aggressive types of human endometrial malignancies. Taken together, our results show that the progeny of single PAX8+ cells represents the main source of regeneration of the adult endometrial epithelium. They also provide direct experimental genetic evidence for the key roles of the P53 and RB pathways in the pathogenesis of serous endometrial carcinoma and suggest that PAX8+ cells represent the cell of origin of this neoplasm.
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MESH Headings
- Aging
- Animals
- Cell Proliferation
- Disease Models, Animal
- Endometrial Neoplasms/genetics
- Endometrial Neoplasms/pathology
- Endometrium/pathology
- Epithelial Cells/metabolism
- Epithelial Cells/pathology
- Epithelium/metabolism
- Epithelium/pathology
- Female
- Forkhead Transcription Factors/genetics
- Forkhead Transcription Factors/metabolism
- Gene Expression Profiling
- Homeostasis
- Immunophenotyping
- Integrases/metabolism
- Mice, Transgenic
- Neoplasms, Cystic, Mucinous, and Serous/genetics
- Neoplasms, Cystic, Mucinous, and Serous/pathology
- PAX8 Transcription Factor/genetics
- PAX8 Transcription Factor/metabolism
- RNA, Messenger/genetics
- RNA, Messenger/metabolism
- Regeneration
- Uterus/metabolism
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Affiliation(s)
- Dah-Jiun Fu
- Department of Biomedical Sciences, Cornell University, Ithaca, NY 14853, USA
- Meinig School of Biomedical Engineering, Cornell University, Ithaca, NY 14853, USA
| | - Andrea J De Micheli
- Meinig School of Biomedical Engineering, Cornell University, Ithaca, NY 14853, USA
- Cornell Stem Cell Program, Cornell University, Ithaca, NY 14853, USA
| | - Mallikarjun Bidarimath
- Department of Biomedical Sciences, Cornell University, Ithaca, NY 14853, USA
- Meinig School of Biomedical Engineering, Cornell University, Ithaca, NY 14853, USA
| | - Lora H Ellenson
- Memorial Sloan-Kettering Cancer Center, New York, NY 10065, USA
| | - Benjamin D Cosgrove
- Meinig School of Biomedical Engineering, Cornell University, Ithaca, NY 14853, USA
- Cornell Stem Cell Program, Cornell University, Ithaca, NY 14853, USA
| | - Andrea Flesken-Nikitin
- Department of Biomedical Sciences, Cornell University, Ithaca, NY 14853, USA
- Meinig School of Biomedical Engineering, Cornell University, Ithaca, NY 14853, USA
| | - Alexander Yu Nikitin
- Department of Biomedical Sciences, Cornell University, Ithaca, NY 14853, USA
- Meinig School of Biomedical Engineering, Cornell University, Ithaca, NY 14853, USA
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15
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Abstract
Scientists often perceive a trade-off between quantity and quality in scientific publishing: finite amounts of time and effort can be spent to produce few high-quality papers or subdivided to produce many papers of lower quality. Despite this perception, previous studies have indicated the opposite relationship, in which productivity (publishing more papers) is associated with increased paper quality (usually measured by citation accumulation). We examine this question in a novel way, comparing members of the National Academy of Sciences with themselves across years, and using a much larger dataset than previously analyzed. We find that a member's most highly cited paper in a given year has more citations in more productive years than in in less productive years. Their lowest cited paper each year, on the other hand, has fewer citations in more productive years. To disentangle the effect of the underlying distributions of citations and productivities, we repeat the analysis for hypothetical publication records generated by scrambling each author's citation counts among their publications. Surprisingly, these artificial histories re-create the above trends almost exactly. Put another way, the observed positive relationship between quantity and quality can be interpreted as a consequence of randomly drawing citation counts for each publication: more productive years yield higher-cited papers because they have more chances to draw a large value. This suggests that citation counts, and the rewards that have come to be associated with them, may be more stochastic than previously appreciated.
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Affiliation(s)
| | - Stefano Allesina
- Department of Ecology & Evolution, University of Chicago, Chicago IL, United States of America 60637
- Computation Institute, University of Chicago, Chicago IL, United States of America 60637
- Northwestern Institute on Complex Systems, Northwestern University, Evanston IL, United States of America 60208
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16
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Hanselman P, Rozek CS, Grigg J, Borman GD. New Evidence on Self-Affirmation Effects and Theorized Sources of Heterogeneity from Large-Scale Replications. J Educ Psychol 2017; 109:405-424. [PMID: 28450753 PMCID: PMC5403146 DOI: 10.1037/edu0000141] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Brief, targeted self-affirmation writing exercises have recently been offered as a way to reduce racial achievement gaps, but evidence about their effects in educational settings is mixed, leaving ambiguity about the likely benefits of these strategies if implemented broadly. A key limitation in interpreting these mixed results is that they come from studies conducted by different research teams with different procedures in different settings; it is therefore impossible to isolate whether different effects are the result of theorized heterogeneity, unidentified moderators, or idiosyncratic features of the different studies. We addressed this limitation by conducting a well-powered replication of self-affirmation in a setting where a previous large-scale field experiment demonstrated significant positive impacts, using the same procedures. We found no evidence of effects in this replication study and estimates were precise enough to reject benefits larger than an effect size of 0.10. These null effects were significantly different from persistent benefits in the prior study in the same setting, and extensive testing revealed that currently theorized moderators of self-affirmation effects could not explain the difference. These results highlight the potential fragility of self-affirmation in educational settings when implemented widely and the need for new theory, measures, and evidence about the necessary conditions for self-affirmation success.
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17
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Chen W, Hammond-Bennett A, Hypnar A. Examination of motor skill competency in students: evidence-based physical education curriculum. BMC Public Health 2017; 17:222. [PMID: 28228116 PMCID: PMC5322665 DOI: 10.1186/s12889-017-4105-2] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2016] [Accepted: 02/03/2017] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND Researchers found that children with a competent level of motor skill performance are more likely to be physically active. This study examined how well K-1 students demonstrated motor skill competency in relation to Physical Education Content Standard 1. METHODS Participants were K-1 grade students (N = 1,223-1,588; boys = 568-857; girls = 526-695; Mean age = 5.5 yrs old) who were enrolled in nine elementary schools. The K-1 students' motor skill competency in running, weight transferring, hand dribbling, and underhand catching skills was assessed using four PE Metrics skill assessment rubrics in the intervention year 1 and year 2, respectively. Data were analyzed by means of descriptive statistics and independent sample t-tests. RESULTS The students in the intervention year 1 and year 2 cohorts performed at the Competent Level or higher in the four skill assessments. The prevalence of the students' demonstration of skill competency across the four skills was high in the two intervention years. The intervention year 2 cohort scored significantly higher than the intervention year 1 cohort in the four skill assessments. The boys significantly outperformed than the girls in the two manipulative skills in the intervention year 1 and in the two manipulative skills and the weight transferring skill in the intervention year 2. No gender differences in the running skill in either year were found. CONCLUSIONS The evidence-based CATCH PE play a critical role in developing and building K-1 students' ability to demonstrate motor skill competency in four fundamental skills. TRIAL REGISTRATION ClinicalTrials.gov ID: NCT03015337 , registered date: 1/09/2017, as "retrospectively registered".
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Affiliation(s)
- Weiyun Chen
- School of Kinesiology, University of Michigan, 1402 Washington Heights, Ann Arbor, MI 48109 USA
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