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Wahl D, Clayton ZS. Peripheral vascular dysfunction and the aging brain. Aging (Albany NY) 2024; 16:9280-9302. [PMID: 38805248 PMCID: PMC11164523 DOI: 10.18632/aging.205877] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2024] [Accepted: 03/28/2024] [Indexed: 05/29/2024]
Abstract
Aging is the greatest non-modifiable risk factor for most diseases, including cardiovascular diseases (CVD), which remain the leading cause of mortality worldwide. Robust evidence indicates that CVD are a strong determinant for reduced brain health and all-cause dementia with advancing age. CVD are also closely linked with peripheral and cerebral vascular dysfunction, common contributors to the development and progression of all types of dementia, that are largely driven by excessive levels of oxidative stress (e.g., reactive oxygen species [ROS]). Emerging evidence suggests that several fundamental aging mechanisms (e.g., "hallmarks" of aging), including chronic low-grade inflammation, mitochondrial dysfunction, cellular senescence and deregulated nutrient sensing contribute to excessive ROS production and are common to both peripheral and cerebral vascular dysfunction. Therefore, targeting these mechanisms to reduce ROS-related oxidative stress and improve peripheral and/or cerebral vascular function may be a promising strategy to reduce dementia risk with aging. Investigating how certain lifestyle strategies (e.g., aerobic exercise and diet modulation) and/or select pharmacological agents (natural and synthetic) intersect with aging "hallmarks" to promote peripheral and/or cerebral vascular health represent a viable option for reducing dementia risk with aging. Therefore, the primary purpose of this review is to explore mechanistic links among peripheral vascular dysfunction, cerebral vascular dysfunction, and reduced brain health with aging. Such insight and assessments of non-invasive measures of peripheral and cerebral vascular health with aging might provide a new approach for assessing dementia risk in older adults.
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Affiliation(s)
- Devin Wahl
- Department of Health and Exercise Science and Center for Healthy Aging, Colorado State University, Fort Collins, CO 80523, USA
| | - Zachary S. Clayton
- University of Colorado Anschutz Medical Campus, Department of Medicine, Division of Geriatric Medicine, Aurora, CO 80045, USA
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Robert C, Ling L, Tan ESJ, Gyanwali B, Venketasubramanian N, Lim SL, Gong L, Berboso JL, Richards AM, Chen C, Hilal S. Effects of Carotid Artery Stiffness on Cerebral Small-Vessel Disease and Cognition. J Am Heart Assoc 2022; 11:e027295. [PMID: 36444832 PMCID: PMC9851463 DOI: 10.1161/jaha.122.027295] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Background Carotid artery stiffness is associated with cognitive impairment and dementia, but the underlying mechanisms remain unknown. We examined the associations of carotid artery stiffness with cerebral small-vessel disease markers, cognition, and dementia subtypes in a memory clinic cohort. Methods and Results A total of 272 participants underwent carotid ultrasonography, 3 Tesla brain magnetic resonance imaging, and neuropsychological assessment. Carotid ultrasonography was used to assess β-index, pressure-strain elastic modulus, and pulse-wave velocity-β. Brain magnetic resonance images were graded for cerebral small-vessel disease markers, including white matter hyperintensities, lacunes, and cerebral microbleeds. Participants were classified as having no cognitive impairment, cognitive impairment and no dementia, or dementia subtyped as Alzheimer disease and vascular dementia. Cognition was assessed using National Institute of Neurological Disorders and Stroke-Canadian Stroke Network harmonization battery. After adjusting for age, sex, cardiovascular risk factors, and diseases, multivariable models showed that β-index (β=0.69; P=0.002), elastic modulus (β=0.78; P<0.001), and pulse-wave velocity-β (β=0.80; P<0.001) were associated with white matter hyperintensities, and elastic modulus (odds ratio [OR], 1.39 [95% CI, 1.04-1.85]) and pulse-wave velocity-β (OR, 1.47 [95% CI, 1.10-1.98]) were independently associated with lacunes. Similarly, β-index (OR, 2.04 [95% CI, 1.14-4.13]), elastic modulus (OR, 2.22 [95% CI, 1.25-4.42]), and pulse-wave velocity-β (OR, 2.50 [95% CI, 1.36-5.18]) were independently associated with vascular dementia. Carotid stiffness measures were independently associated with worse performance in global cognition, visuomotor speed, visuospatial function, and executive function. These associations became largely nonsignificant after further adjusting for cerebral small-vessel disease markers. Conclusions In memory clinic patients, carotid artery stiffness was associated with white matter hyperintensities and lacunes, impairment in global and domain-specific cognition, and causative subtypes of dementia, particularly vascular. The effects of carotid stiffness on cognition were not independent of, and were partially mediated by, cerebral small-vessel disease.
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Affiliation(s)
- Caroline Robert
- Department of Pharmacology, Yong Loo Lin School of MedicineNational University of SingaporeSingapore CitySingapore,Memory Aging and Cognition CentreNational University Health SystemSingapore CitySingapore
| | - Lieng‐Hsi Ling
- Department of CardiologyNational University Heart CentreSingapore CitySingapore,Department of Medicine, Yong Loo Lin School of MedicineNational University of SingaporeSingapore CitySingapore
| | - Eugene S. J. Tan
- Department of CardiologyNational University Heart CentreSingapore CitySingapore
| | - Bibek Gyanwali
- Memory Aging and Cognition CentreNational University Health SystemSingapore CitySingapore,Department of BiochemistryYong Loo Lin School of MedicineSingapore CitySingapore
| | | | - Shir Lynn Lim
- Department of CardiologyNational University Heart CentreSingapore CitySingapore
| | - Lingli Gong
- Department of Medicine, Yong Loo Lin School of MedicineNational University of SingaporeSingapore CitySingapore
| | - Josephine Lunaria Berboso
- Department of Medicine, Yong Loo Lin School of MedicineNational University of SingaporeSingapore CitySingapore
| | - Arthur Mark Richards
- Department of Medicine, Yong Loo Lin School of MedicineNational University of SingaporeSingapore CitySingapore,Cardiovascular Research InstituteNational University Health SystemSingapore CitySingapore,Christchurch Heart InstituteUniversity of OtagoSingapore CitySingapore
| | - Christopher Chen
- Department of Pharmacology, Yong Loo Lin School of MedicineNational University of SingaporeSingapore CitySingapore,Memory Aging and Cognition CentreNational University Health SystemSingapore CitySingapore
| | - Saima Hilal
- Department of Pharmacology, Yong Loo Lin School of MedicineNational University of SingaporeSingapore CitySingapore,Memory Aging and Cognition CentreNational University Health SystemSingapore CitySingapore,Saw Swee Hock School of Public HealthNational University of Singapore and National University Health SystemSingapore CitySingapore
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Baradaran H, Gupta A. Carotid Artery Stiffness: Imaging Techniques and Impact on Cerebrovascular Disease. Front Cardiovasc Med 2022; 9:852173. [PMID: 35369341 PMCID: PMC8964780 DOI: 10.3389/fcvm.2022.852173] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2022] [Accepted: 02/16/2022] [Indexed: 11/24/2022] Open
Abstract
Arterial stiffness is an important measure of vascular aging and atherosclerosis. Though it is measured in many well-known epidemiologic cohort studies, arterial stiffness is often overlooked in routine clinical practice for a number of reasons including difficulties in measurement, variations in definition, and uncertainties surrounding treatment. Central arterial stiffness, a surrogate for aortic stiffness, is the most commonly measured marker of arterial stiffness. In addition to central stiffness, there are also a number of ultrasound based techniques to measure local vascular stiffness, including carotid stiffness. There is evidence that both local carotid stiffness and central arterial stiffness measures are associated with multiple cerebrovascular processes, including stroke and cognitive dysfunction. Mechanistic explanations supporting this association include increased flow load experienced by the cerebral microvasculature leading to cerebral parenchymal damage. In this article, we review definitions of carotid artery stiffness measures and pathophysiologic mechanisms underpinning its association with plaque development and downstream cerebral pathology. We will review the evidence surrounding the association of carotid stiffness measures with downstream manifestations including stroke, cerebral small vessel disease detected on brain MR such as white matter hyperintensities and covert brain infarctions, brain atrophy, and cognitive dysfunction. With consistent definitions, measurement methods, and further scientific support, carotid stiffness may have potential as an imaging-based risk factor for stroke and cognitive decline.
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Affiliation(s)
- Hediyeh Baradaran
- Department of Radiology, University of Utah, Salt Lake City, UT, United States
- *Correspondence: Hediyeh Baradaran
| | - Ajay Gupta
- Department of Radiology, Weill Cornell Medicine, New York, NY, United States
- Feil Family Brain and Mind Research Institute, Weill Cornell Medicine, New York, NY, United States
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Baradaran H, Sarrami AH, Gupta A. Asymptomatic Carotid Disease and Cognitive Impairment: What Is the Evidence? Front Neurol 2021; 12:741500. [PMID: 34867724 PMCID: PMC8636319 DOI: 10.3389/fneur.2021.741500] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Accepted: 10/25/2021] [Indexed: 11/23/2022] Open
Abstract
The development of cognitive dysfunction and dementia is a complex, multifactorial process. One of the contributors to various types of cognitive dysfunction is carotid atherosclerosis which can frequently be seen in asymptomatic individuals. There are a number of different manifestations of asymptomatic carotid atherosclerosis including arterial stiffness, carotid intima-media thickening, flow-limiting stenosis, and complex, atherosclerotic plaque. Each of these forms of atherosclerosis may contribute to cerebral parenchymal damage, contributing to cognitive dysfunction. In this review article, we will discuss each of these forms of carotid atherosclerosis, present the potential mechanistic underpinnings behind an association, and then review the scientific evidence supporting potential associations to cognitive dysfunction and dementia.
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Affiliation(s)
- Hediyeh Baradaran
- Department of Radiology and Imaging Sciences, University of Utah, Salt Lake City, UT, United States
| | - Amir Hossein Sarrami
- Department of Radiology and Imaging Sciences, University of Utah, Salt Lake City, UT, United States
| | - Ajay Gupta
- Department of Radiology, Weill Cornell Medicine, New York, NY, United States.,Feil Family Brain and Mind Research Institute, Weill Cornell Medicine, New York, NY, United States
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Brunette AM, Warner K, Holm KE, Meschede K, Wamboldt FS, Kozora E, Moser DJ, Make BJ, Crapo JD, Moreau KL, Weinberger HD, Bowler R, Hoth KF. Daily Activities: The Impact of COPD and Cognitive Dysfunction. Arch Clin Neuropsychol 2021; 36:acaa090 767 779-767. [PMID: 33103191 PMCID: PMC8500183 DOI: 10.1093/arclin/acaa090] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/16/2020] [Indexed: 12/14/2022] Open
Abstract
OBJECTIVE Chronic obstructive pulmonary disease (COPD) is characterized by airflow limitation; however, pulmonary function does not fully account for patients' functional difficulties. The primary aim of the study was to determine the association between several domains of cognition and daily activity among those with COPD. METHOD Eighty-nine former smokers completed a neuropsychological battery including measures across multiple domains of cognition, pulmonary function measures, and daily activity questionnaires. Using a cross-sectional design, we compared daily activity between former smokers with and without COPD using two measures (St. George's Respiratory Questionnaire [SGRQ] Activity Subscale and Lawton Instrumental Activities of Daily Living [IADL] Scale) and examined the association between cognition and daily activity among those with COPD. RESULTS As expected, former smokers with COPD reported more difficulty than those without COPD on both activity measures (SGRQ Activity Subscale p < .001; Lawton IADL Scale p = .040). Among former smokers with COPD, poorer delayed recall was associated with more difficulty with daily activities (SGRQ Activity Subscale) (p = .038) while adjusting for severity of airflow limitation, exercise tolerance, oxygen use, dyspnea, and symptoms of anxiety and depression. CONCLUSION The findings suggest that cognition is associated with daily activity in patients with COPD. Future research should examine whether cognitive interventions may help to maximize patients' engagement in daily activities.
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Affiliation(s)
- Amanda M Brunette
- University of Iowa, Department of Psychological and Brain Sciences, Iowa City, IA 52242, USA
| | - Kelsey Warner
- University of Iowa Carver College of Medicine, Department of Psychiatry, Iowa City, IA 52242, USA
- Hennepin Healthcare, Department of Speech-Language Pathology, Minneapolis, MN 55404, USA
| | - Kristen E Holm
- National Jewish Health, Department of Medicine, Denver, CO 80206, USA
- Colorado School of Public Health, Department of Community and Behavioral Health, Aurora, CO 80045, USA
| | - Kimberly Meschede
- National Jewish Health, Department of Medicine, Denver, CO 80206, USA
| | - Frederick S Wamboldt
- National Jewish Health, Department of Medicine, Denver, CO 80206, USA
- University of Colorado School of Medicine at the Anschutz Medical Campus, Department of Psychiatry, Aurora, CO 80045, USA
| | - Elizabeth Kozora
- National Jewish Health, Department of Medicine, Denver, CO 80206, USA
- University of Colorado School of Medicine at the Anschutz Medical Campus, Department of Psychiatry, Aurora, CO 80045, USA
| | - David J Moser
- University of Iowa Carver College of Medicine, Department of Psychiatry, Iowa City, IA 52242, USA
| | - Barry J Make
- National Jewish Health, Department of Medicine, Denver, CO 80206, USA
- University of Colorado School of Medicine at the Anschutz Medical Campus, Department of Medicine, Aurora, CO 80045, USA
| | - James D Crapo
- National Jewish Health, Department of Medicine, Denver, CO 80206, USA
- University of Colorado School of Medicine at the Anschutz Medical Campus, Department of Medicine, Aurora, CO 80045, USA
| | - Kerrie L Moreau
- University of Colorado School of Medicine at the Anschutz Medical Campus, Department of Medicine, Aurora, CO 80045, USA
- Denver Veterans Administration Medical Center, Geriatric Research Education and Clinical Center, Denver, CO 80220 USA
| | - Howard D Weinberger
- National Jewish Health, Department of Medicine, Denver, CO 80206, USA
- University of Colorado School of Medicine at the Anschutz Medical Campus, Department of Medicine, Aurora, CO 80045, USA
| | - Russell Bowler
- National Jewish Health, Department of Medicine, Denver, CO 80206, USA
- University of Colorado School of Medicine at the Anschutz Medical Campus, Department of Medicine, Aurora, CO 80045, USA
| | - Karin F Hoth
- University of Iowa Carver College of Medicine, Department of Psychiatry, Iowa City, IA 52242, USA
- National Jewish Health, Department of Medicine, Denver, CO 80206, USA
- University of Iowa, Iowa Neuroscience Institute, Iowa City, IA 52242, USA
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Luehrs RE, Moreau KL, Pierce GL, Wamboldt F, Aloia M, Weinberger HD, Make B, Bowler R, Crapo JD, Meschede K, Kozora E, Moser DJ, Hoth KF. Cognitive performance is lower among individuals with overlap syndrome than in individuals with COPD or obstructive sleep apnea alone: association with carotid artery stiffness. J Appl Physiol (1985) 2021; 131:131-141. [PMID: 33982592 PMCID: PMC8325616 DOI: 10.1152/japplphysiol.00477.2020] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Revised: 04/29/2021] [Accepted: 05/03/2021] [Indexed: 12/13/2022] Open
Abstract
Chronic obstructive pulmonary disease (COPD) and obstructive sleep apnea (OSA) are both independently associated with increased cardiovascular disease (CVD) risk and impaired cognitive function. It is unknown if individuals with both COPD and OSA (i.e., overlap syndrome) have greater common carotid artery (CCA) stiffness, an independent predictor of CVD risk, and lower cognitive performance than either COPD or OSA alone. Elevated CCA stiffness is associated with cognitive impairment in former smokers with and without COPD in past studies. We compared CCA stiffness and cognitive performance between former smokers with overlap syndrome, COPD only, OSA only and former smoker controls using analysis of covariance (ANCOVA) tests to adjust for age, sex, body mass index (BMI), pack years, and postbronchodilator FEV1/FVC. We also examined the association between CCA stiffness and cognitive performance among each group separately. Individuals with overlap syndrome (n = 12) had greater CCA β-stiffness index (P = 0.015) and lower executive function-processing speed (P = 0.019) than individuals with COPD alone (n = 47), OSA alone (n = 9), and former smoker controls (n = 21), differences that remained significant after adjusting for age, BMI, sex, pack years, and FEV1/FVC. Higher CCA β-stiffness index was associated with lower executive function-processing speed in individuals with overlap syndrome (r = -0.58, P = 0.047). These data suggest that CCA stiffness is greater and cognitive performance is lower among individuals with overlap syndrome compared with individuals with COPD or OSA alone and that CCA stiffening may be an underlying mechanism contributing to the lower cognitive performance observed in patients with overlap syndrome.NEW & NOTEWORTHY Previous studies have demonstrated greater carotid artery stiffness and lower cognitive function among individuals with COPD alone and OSA alone. However, the present study is the first to demonstrate that individuals that have both COPD and OSA (i.e., overlap syndrome) have greater carotid artery stiffness and lower executive function-processing speed than individuals with either disorder alone. Furthermore, among individuals with overlap syndrome greater carotid artery stiffness is associated with lower executive function-processing speed.
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Affiliation(s)
- Rachel E Luehrs
- Department of Health and Human Physiology, University of Iowa, Iowa City, Iowa
- Department of Kinesiology, North Central College, Naperville, Illinois
| | - Kerrie L Moreau
- Department of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado
- Eastern Colorado VA Geriatric, Research, Education, and Clinical Center (GRECC), Aurora, Colorado
| | - Gary L Pierce
- Department of Health and Human Physiology, University of Iowa, Iowa City, Iowa
- Abboud Cardiovascular Research Center, University of Iowa, Iowa City, Iowa
| | - Frederick Wamboldt
- Department of Medicine, National Jewish Health, Denver, Colorado
- Department of Psychiatry, University of Colorado Anschutz Medical Campus, Aurora, Colorado
| | - Mark Aloia
- Department of Medicine, National Jewish Health, Denver, Colorado
| | - Howard D Weinberger
- Department of Medicine, National Jewish Health, Denver, Colorado
- Department of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado
| | - Barry Make
- Department of Medicine, National Jewish Health, Denver, Colorado
- Department of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado
| | - Russell Bowler
- Department of Medicine, National Jewish Health, Denver, Colorado
- Department of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado
| | - James D Crapo
- Department of Medicine, National Jewish Health, Denver, Colorado
- Department of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado
| | | | - Elizabeth Kozora
- Department of Medicine, National Jewish Health, Denver, Colorado
- Department of Psychiatry, University of Colorado Anschutz Medical Campus, Aurora, Colorado
| | - David J Moser
- Department of Psychiatry, University of Iowa, Iowa City, Iowa
| | - Karin F Hoth
- Department of Psychiatry, University of Iowa, Iowa City, Iowa
- Iowa Neuroscience Institute, University of Iowa, Iowa City, Iowa
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Hoth KF, Moreau KL, Weinberger HD, Holm KE, Meschede K, Crapo JD, Make BJ, Moser DJ, Kozora E, Bowler RP, Pierce GL, Ten Eyck P, Wamboldt FS. Carotid Artery Stiffness is Associated With Cognitive Performance in Former Smokers With and Without Chronic Obstructive Pulmonary Disease. J Am Heart Assoc 2020; 9:e014862. [PMID: 32338117 PMCID: PMC7428572 DOI: 10.1161/jaha.119.014862] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Accepted: 03/05/2020] [Indexed: 11/16/2022]
Abstract
Background Heavy smokers perform worse on neuropsychological assessment than age-matched peers. However, traditional pulmonary measures of airflow limitation and hypoxemia explain only a modest amount of variance in cognition. The current objective was to determine whether carotid artery stiffness is associated with cognition in former smokers beyond the effects of amount of smoking and pulmonary function. Methods and Results Eighty-four former smokers including individuals across a spectrum of airflow limitation severity were included: 30 without chronic obstructive pulmonary disease (Global Initiative for Chronic Obstructive Lung Disease [GOLD] 0 with normal spirometry and lung computed tomography), 31 with mild-moderate chronic obstructive pulmonary disease (GOLD 1-2), and 23 with severe-very severe chronic obstructive pulmonary disease (GOLD 3-4). Participants completed questionnaires, spirometry, carotid ultrasonography, and neuropsychological testing. Multiple linear regression was used to determine whether carotid artery stiffness is associated with neuropsychological performance in 4 cognitive domains after adjusting for age, sex, pack-years of smoking, estimated premorbid intellectual functioning, and airflow limitation. Higher carotid artery β-stiffness index was associated with reduced executive functioning-processing speed in the fully adjusted model (β=-0.49, SE=0.14; P=0.001). Lower premorbid intellectual function, male sex, and presence of airflow limitation (GOLD 1 or 2 and GOLD 3 or 4) were also associated with worse executive functioning-processing speed. β-Stiffness index was not significantly associated with performance in other cognitive domains. Conclusions Carotid artery stiffness is associated with worse performance on executive functioning-processing speed in former smokers beyond the effects of aging, amount of past smoking, severity of airflow limitation, and hypoxemia. Future research should examine whether carotid stiffness can be used to identify former smokers at risk for subsequent cognitive impairment.
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Affiliation(s)
- Karin F. Hoth
- PsychiatryUniversity of IowaIowa CityIA
- Iowa Neuroscience InstituteUniversity of IowaIowa CityIA
- MedicineNational Jewish HealthDenverCO
| | | | - Howard D. Weinberger
- MedicineNational Jewish HealthDenverCO
- MedicineUniversity of Colorado Anschutz Medical CampusAuroraCO
| | - Kristen E. Holm
- MedicineNational Jewish HealthDenverCO
- Community and Behavioral HealthUniversity of Colorado School of Public HealthAuroraCO
| | | | - James D. Crapo
- MedicineNational Jewish HealthDenverCO
- MedicineUniversity of Colorado Anschutz Medical CampusAuroraCO
| | - Barry J. Make
- MedicineNational Jewish HealthDenverCO
- MedicineUniversity of Colorado Anschutz Medical CampusAuroraCO
| | | | - Elizabeth Kozora
- MedicineNational Jewish HealthDenverCO
- PsychiatryUniversity of Colorado Anschutz Medical CampusAuroraCO
| | - Russell P. Bowler
- MedicineNational Jewish HealthDenverCO
- MedicineUniversity of Colorado Anschutz Medical CampusAuroraCO
| | - Gary L. Pierce
- Health and Human PhysiologyUniversity of IowaIowa CityIA
- Abboud Cardiovascular Research CenterUniversity of IowaIowa CityIA
- Environmental Health Sciences Research CenterUniversity of IowaIowa CityIA
| | - Patrick Ten Eyck
- Institute for Clinical and Translational ScienceUniversity of IowaIowa CityIA
| | - Frederick S. Wamboldt
- MedicineNational Jewish HealthDenverCO
- PsychiatryUniversity of Colorado Anschutz Medical CampusAuroraCO
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