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Yadid M, Hagel M, Labro MB, Le Roi B, Flaxer C, Flaxer E, Barnea AR, Tejman‐Yarden S, Silberman E, Li X, Rauti R, Leichtmann‐Bardoogo Y, Yuan H, Maoz BM. A Platform for Assessing Cellular Contractile Function Based on Magnetic Manipulation of Magnetoresponsive Hydrogel Films. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2207498. [PMID: 37485582 PMCID: PMC10520681 DOI: 10.1002/advs.202207498] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2022] [Revised: 06/08/2023] [Indexed: 07/25/2023]
Abstract
Despite significant advancements in in vitro cardiac modeling approaches, researchers still lack the capacity to obtain in vitro measurements of a key indicator of cardiac function: contractility, or stroke volume under specific loading conditions-defined as the pressures to which the heart is subjected prior to and during contraction. This work puts forward a platform that creates this capability, by providing a means of dynamically controlling loading conditions in vitro. This dynamic tissue loading platform consists of a thin magnetoresponsive hydrogel cantilever on which 2D engineered myocardial tissue is cultured. Exposing the cantilever to an external magnetic field-generated by positioning magnets at a controlled distance from the cantilever-causes the hydrogel film to stretch, creating tissue load. Next, cell contraction is induced through electrical stimulation, and the force of the contraction is recorded, by measuring the cantilever's deflection. Force-length-based measurements of contractility are then derived, comparable to clinical measurements. In an illustrative application, the platform is used to measure contractility both in untreated myocardial tissue and in tissue exposed to an inotropic agent. Clear differences are observed between conditions, suggesting that the proposed platform has significant potential to provide clinically relevant measurements of contractility.
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Affiliation(s)
- Moran Yadid
- The Azrieli Faculty of MedicineBar Ilan University8 Henrietta Szold St.Safed1311502Israel
- The Shmunis School of Biomedicine and Cancer ResearchTel Aviv UniversityTel Aviv69978Israel
| | - Mario Hagel
- Department of Biomedical EngineeringTel Aviv UniversityTel Aviv69978Israel
| | | | - Baptiste Le Roi
- Department of Biomedical EngineeringTel Aviv UniversityTel Aviv69978Israel
| | - Carina Flaxer
- Department of Biomedical EngineeringTel Aviv UniversityTel Aviv69978Israel
| | - Eli Flaxer
- AFEKA – Tel‐Aviv Academic College of EngineeringTel‐Aviv69107Israel
| | - A. Ronny Barnea
- Department of Biomedical EngineeringTel Aviv UniversityTel Aviv69978Israel
| | - Shai Tejman‐Yarden
- The Edmond J. Safra International Congenital Heart CenterSheba Medical CenterRamat Gan52621Israel
- The Engineering Medical Research LabSheba Medical CenterRamat Gan52621Israel
- The Sackler School of MedicineTel Aviv UniversityTel Aviv69978Israel
| | - Eric Silberman
- The Shmunis School of Biomedicine and Cancer ResearchTel Aviv UniversityTel Aviv69978Israel
| | - Xin Li
- Shenzhen Key Laboratory of Soft Mechanics and Smart ManufacturingDepartment of Mechanics and Aerospace EngineeringSouthern University of Science and TechnologyShenzhen518055China
| | - Rossana Rauti
- Department of Biomolecular SciencesUniversity of Urbino Carlo BoUrbino61029Italy
| | | | - Hongyan Yuan
- Shenzhen Key Laboratory of Soft Mechanics and Smart ManufacturingDepartment of Mechanics and Aerospace EngineeringSouthern University of Science and TechnologyShenzhen518055China
| | - Ben M. Maoz
- Department of Biomedical EngineeringTel Aviv UniversityTel Aviv69978Israel
- Sagol School of NeuroscienceTel Aviv UniversityTel Aviv69978Israel
- The Center for Nanoscience and NanotechnologyTel Aviv UniversityTel Aviv69978Israel
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2
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Bioengineering approaches to treat the failing heart: from cell biology to 3D printing. Nat Rev Cardiol 2022; 19:83-99. [PMID: 34453134 DOI: 10.1038/s41569-021-00603-7] [Citation(s) in RCA: 25] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 07/12/2021] [Indexed: 02/08/2023]
Abstract
Successfully engineering a functional, human, myocardial pump would represent a therapeutic alternative for the millions of patients with end-stage heart disease and provide an alternative to animal-based preclinical models. Although the field of cardiac tissue engineering has made tremendous advances, major challenges remain, which, if properly resolved, might allow the clinical implementation of engineered, functional, complex 3D structures in the future. In this Review, we provide an overview of state-of-the-art studies, challenges that have not yet been overcome and perspectives on cardiac tissue engineering. We begin with the most clinically relevant cell sources used in this field and discuss the use of topological, biophysical and metabolic stimuli to obtain mature phenotypes of cardiomyocytes, particularly in relation to organized cytoskeletal and contractile intracellular structures. We then move from the cellular level to engineering planar cardiac patches and discuss the need for proper vascularization and the main strategies for obtaining it. Finally, we provide an overview of several different approaches for the engineering of volumetric organs and organ parts - from whole-heart decellularization and recellularization to advanced 3D printing technologies.
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3
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Sun M, Cao X, Guo Y, Tan X, Dong L, Pan C, Shu X. Long-term impacts of hemodialysis on the right ventricle: Assessment via 3-dimensional speckle-tracking echocardiography. Clin Cardiol 2018; 41:87-95. [PMID: 29363796 DOI: 10.1002/clc.22857] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/31/2017] [Revised: 11/06/2017] [Accepted: 11/21/2017] [Indexed: 11/08/2022] Open
Abstract
BACKGROUND Right ventricular (RV) dysfunction is a major cause of death in patients undergoing maintenance hemodialysis (MHD). We used 3-dimensional speckle-tracking echocardiography (3DSTE) to evaluate long-term impacts of MHD on RV function. HYPOTHESIS In this study, RV dysfunction in MHD patients will be revealed and studied in depth by 3DSTE. METHODS Echocardiography was performed on 110 consecutively enrolled individuals: 30 controls and 80 patients with MHD. Conventional echocardiographic parameters and 3DSTE parameters were obtained and compared between groups. Univariate and multivariate logistic regression analysis identified independent predictors of intradialytic hypotension (IDH). RESULTS Compared with the control group, RV end-diastolic volume (RVEDV) was markedly enlarged (46.1 ± 11.8 mL/m2 vs 42.3 ± 8.6 mL/m2 ; P = 0.047), whereas RV ejection fraction (RVEF) was significantly lower in the MHD group (50.6% ± 5.8% vs 55.2% ± 3.7%; P < 0.001). RV global, septal, and lateral wall longitudinal strains were also decreased in the MHD group (-18.2 ± 3.6 vs -22.6 ± 4.3%; -13.1 ± 3.8 vs -17.5 ± 5.5%; and -23.4 ± 4.7 vs -27.7 ± 4.0%, respectively; all P < 0.001). RVEF (odds ratio [OR]: 0.72, 95% confidence interval [CI]: 0.51 to 1.01, P = 0.038) and history of diabetes (OR: 11.14, 95% CI: 1.16 to 106.71, P = 0.036) were 2 independent predictors of IDH. Ultrafiltration rate was an independent factor associated with RVEF (β = -0.01, 95% CI: -0.019 to 0.001, P = 0.039). CONCLUSIONS RVEF by 3DSTE could be an important predictor of IDH in MHD patients, and lower ultrafiltration rate was protective for RVEF. 3DSTE may have potential in RV evaluation and risk stratification in MHD patients.
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Affiliation(s)
- Minmin Sun
- Department of Echocardiography, Zhongshan Hospital of Fudan University, Shanghai, China; Shanghai Institute of Cardiovascular Diseases, Shanghai Institute of Medical Imaging, Shanghai, China
| | - Xuesen Cao
- Department of Nephrology, Zhongshan Hospital of Fudan University, Shanghai, China
| | - Yao Guo
- Department of Echocardiography, Zhongshan Hospital of Fudan University, Shanghai, China; Shanghai Institute of Cardiovascular Diseases, Shanghai Institute of Medical Imaging, Shanghai, China
| | - Xiao Tan
- Department of Nephrology, Zhongshan Hospital of Fudan University, Shanghai, China
| | - Lili Dong
- Department of Echocardiography, Zhongshan Hospital of Fudan University, Shanghai, China; Shanghai Institute of Cardiovascular Diseases, Shanghai Institute of Medical Imaging, Shanghai, China
| | - Cuizhen Pan
- Department of Echocardiography, Zhongshan Hospital of Fudan University, Shanghai, China; Shanghai Institute of Cardiovascular Diseases, Shanghai Institute of Medical Imaging, Shanghai, China
| | - Xianhong Shu
- Department of Echocardiography, Zhongshan Hospital of Fudan University, Shanghai, China; Shanghai Institute of Cardiovascular Diseases, Shanghai Institute of Medical Imaging, Shanghai, China
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Thimm TN, Squirrell JM, Liu Y, Eliceiri KW, Ogle BM. Endogenous Optical Signals Reveal Changes of Elastin and Collagen Organization During Differentiation of Mouse Embryonic Stem Cells. Tissue Eng Part C Methods 2015; 21:995-1004. [PMID: 25923353 DOI: 10.1089/ten.tec.2014.0699] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Components of the extracellular matrix (ECM) have recently been shown to influence stem cell specification. However, it has been challenging to assess the spatial and temporal dynamics of stem cell-ECM interactions because most methodologies utilized to date require sample destruction or fixation. We examined the efficacy of utilizing the endogenous optical signals of two important ECM proteins, elastin (Eln), through autofluorescence, and type I collagen (ColI), through second harmonic generation (SHG), during mouse embryonic stem cell differentiation. After finding favorable overlap between antibody labeling and the endogenous fluorescent signal of Eln, we used this endogenous signal to map temporal changes in Eln and ColI during murine embryoid body differentiation and found that Eln increases until day 9 and then decreases slightly by day 12, while Col1 steadily increases over the 12-day period. Furthermore, we combined endogenous fluorescence imaging and SHG with antibody labeling of cardiomyocytes to examine the spatial relationship between Eln and ColI accumulation and cardiomyocyte differentiation. Eln was ubiquitously present, with enrichment in regions with cardiomyocyte differentiation, while there was an inverse correlation between ColI and cardiomyocyte differentiation. This work provides an important first step for utilizing endogenous optical signals, which can be visualized in living cells, to understand the relationship between the ECM and cardiomyocyte development and sets the stage for future studies of stem cell-ECM interactions and dynamics relevant to stem cells as well as other cell and tissue types.
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Affiliation(s)
- Terra N Thimm
- 1 Laboratory for Optical and Computational Instrumentation, University of Wisconsin-Madison , Madison, Wisconsin
| | - Jayne M Squirrell
- 1 Laboratory for Optical and Computational Instrumentation, University of Wisconsin-Madison , Madison, Wisconsin
| | - Yuming Liu
- 1 Laboratory for Optical and Computational Instrumentation, University of Wisconsin-Madison , Madison, Wisconsin
| | - Kevin W Eliceiri
- 1 Laboratory for Optical and Computational Instrumentation, University of Wisconsin-Madison , Madison, Wisconsin.,2 Morgridge Institute for Research, University of Wisconsin-Madison , Madison, Wisconsin
| | - Brenda M Ogle
- 3 Department of Biomedical Engineering, University of Minnesota-Twin Cities , Minneapolis, Minnesota
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Benam KH, Dauth S, Hassell B, Herland A, Jain A, Jang KJ, Karalis K, Kim HJ, MacQueen L, Mahmoodian R, Musah S, Torisawa YS, van der Meer AD, Villenave R, Yadid M, Parker KK, Ingber DE. Engineered in vitro disease models. ANNUAL REVIEW OF PATHOLOGY-MECHANISMS OF DISEASE 2015; 10:195-262. [PMID: 25621660 DOI: 10.1146/annurev-pathol-012414-040418] [Citation(s) in RCA: 355] [Impact Index Per Article: 39.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The ultimate goal of most biomedical research is to gain greater insight into mechanisms of human disease or to develop new and improved therapies or diagnostics. Although great advances have been made in terms of developing disease models in animals, such as transgenic mice, many of these models fail to faithfully recapitulate the human condition. In addition, it is difficult to identify critical cellular and molecular contributors to disease or to vary them independently in whole-animal models. This challenge has attracted the interest of engineers, who have begun to collaborate with biologists to leverage recent advances in tissue engineering and microfabrication to develop novel in vitro models of disease. As these models are synthetic systems, specific molecular factors and individual cell types, including parenchymal cells, vascular cells, and immune cells, can be varied independently while simultaneously measuring system-level responses in real time. In this article, we provide some examples of these efforts, including engineered models of diseases of the heart, lung, intestine, liver, kidney, cartilage, skin and vascular, endocrine, musculoskeletal, and nervous systems, as well as models of infectious diseases and cancer. We also describe how engineered in vitro models can be combined with human inducible pluripotent stem cells to enable new insights into a broad variety of disease mechanisms, as well as provide a test bed for screening new therapies.
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Affiliation(s)
- Kambez H Benam
- Wyss Institute for Biologically Inspired Engineering at Harvard University, Boston, Massachusetts 02115;
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Campbell KS. Dynamic coupling of regulated binding sites and cycling myosin heads in striated muscle. ACTA ACUST UNITED AC 2014; 143:387-99. [PMID: 24516189 PMCID: PMC3933939 DOI: 10.1085/jgp.201311078] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Myosim, a computer model of muscle contraction, includes molecular-level effects and incorporates dynamic coupling of myosin heads and binding sites. In an activated muscle, binding sites on the thin filament and myosin heads switch frequently between different states. Because the status of the binding sites influences the status of the heads, and vice versa, the binding sites and myosin heads are dynamically coupled. The functional consequences of this coupling were investigated using MyoSim, a new computer model of muscle. MyoSim extends existing models based on Huxley-type distribution techniques by incorporating Ca2+ activation and cooperative effects. It can also simulate arbitrary cross-bridge schemes set by the researcher. Initial calculations investigated the effects of altering the relative speeds of binding-site and cross-bridge kinetics, and of manipulating cooperative processes. Subsequent tests fitted simulated force records to experimental data recorded using permeabilized myocardial preparations. These calculations suggest that the rate of force development at maximum activation is limited by myosin cycling kinetics, whereas the rate at lower levels of activation is limited by how quickly binding sites become available. Additional tests investigated the behavior of transiently activated cells by driving simulations with experimentally recorded Ca2+ signals. The unloaded shortening profile of a twitching myocyte could be reproduced using a model with two myosin states, cooperative activation, and strain-dependent kinetics. Collectively, these results demonstrate that dynamic coupling of binding sites and myosin heads is important for contractile function.
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Affiliation(s)
- Kenneth S Campbell
- Department of Physiology and Center for Muscle Biology, University of Kentucky, Lexington, KY 40536
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Pressure-overload-induced right heart failure. Pflugers Arch 2014; 466:1055-63. [PMID: 24488007 DOI: 10.1007/s00424-014-1450-1] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2014] [Accepted: 01/13/2014] [Indexed: 01/27/2023]
Abstract
Although pulmonary arterial hypertension originates in the lung and is caused by progressive remodeling of the small pulmonary arterioles, patients die from the consequences of pressure-overload-induced right heart failure. Prognosis is poor, and currently there are no selective treatments targeting the failing right ventricle. Therefore, it is of utmost importance to obtain more insights into the mechanisms of right ventricular adaptation and the transition toward right heart failure. In this review, we propose that the same adaptive mechanisms, which initially preserve right ventricular systolic function and maintain cardiac output, eventually initiate the transition toward right heart failure.
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Ordelman SCMA, Kornet L, Cornelussen R, Buschman HPJ, Veltink PH. Selectivity for Specific Cardiovascular Effects of Vagal Nerve Stimulation With a Multi-Contact Electrode Cuff. IEEE Trans Neural Syst Rehabil Eng 2013; 21:32-6. [DOI: 10.1109/tnsre.2012.2214058] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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9
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Han JC, Tran K, Taberner AJ, Nickerson DP, Kirton RS, Nielsen PMF, Ward ML, Nash MP, Crampin EJ, Loiselle DS. Myocardial twitch duration and the dependence of oxygen consumption on pressure-volume area: experiments and modelling. J Physiol 2012; 590:4603-22. [PMID: 22570375 PMCID: PMC3477760 DOI: 10.1113/jphysiol.2012.228965] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2012] [Accepted: 05/02/2012] [Indexed: 11/08/2022] Open
Abstract
We tested the proposition that linear length dependence of twitch duration underlies the well-characterised linear dependence of oxygen consumption (V(O(2)) ) on pressure–volume area (PVA) in the heart. By way of experimental simplification, we reduced the problem from three dimensions to one by substituting cardiac trabeculae for the classically investigated whole-heart. This allowed adoption of stress–length area (SLA) as a surrogate for PVA, and heat as a proxy for V(O(2)) . Heat and stress (force per cross-sectional area), at a range of muscle lengths and at both 1 mM and 2 mM [Ca(2+)](o), were recorded from continuously superfused rat right-ventricular trabeculae undergoing fixed-end contractions. The heat–SLA relations of trabeculae (reported here, for the first time) are linear. Twitch duration increases monotonically (but not strictly linearly) with muscle length. We probed the cellular mechanisms of this phenomenon by determining: (i) the length dependence of the duration of the Ca(2+) transient, (ii) the length dependence of the rate of force redevelopment following a length impulse (an index of Ca(2+) binding to troponin-C), (iii) the effect on the simulated time course of the twitch of progressive deletion of length and Ca(2+)-dependent mechanisms of crossbridge cooperativity, using a detailed mathematical model of the crossbridge cycle, and (iv) the conditions required to achieve these multiple length dependencies, using a greatly simplified model of twitch mechano-energetics. From the results of these four independent investigations, we infer that the linearity of the heat–SLA relation (and, by analogy, the V(O(2))–PVA relation) is remarkably robust in the face of departures from linearity of length-dependent twitch duration.
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Affiliation(s)
- J-C Han
- Auckland Bioengineering Institute, University of Auckland, Auckland, New Zealand
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Weith AE, Previs MJ, Hoeprich GJ, Previs SB, Gulick J, Robbins J, Warshaw DM. The extent of cardiac myosin binding protein-C phosphorylation modulates actomyosin function in a graded manner. J Muscle Res Cell Motil 2012; 33:449-59. [PMID: 22752314 DOI: 10.1007/s10974-012-9312-y] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2012] [Accepted: 06/14/2012] [Indexed: 01/10/2023]
Abstract
Cardiac myosin binding protein-C (cMyBP-C), a sarcomeric protein with 11 domains, C0-C10, binds to the myosin rod via its C-terminus, while its N-terminus binds regions of the myosin head and actin. These N-terminal interactions can be attenuated by phosphorylation of serines in the C1-C2 motif linker. Within the sarcomere, cMyBP-C exists in a range of phosphorylation states, which may affect its ability to regulate actomyosin motion generation. To examine the functional importance of partial phosphorylation, we bacterially expressed N-terminal fragments of cMyBP-C (domains C0-C3) with three of its phosphorylatable serines (S273, S282, and S302) mutated in combinations to either aspartic acids or alanines, mimicking phosphorylation and dephosphorylation respectively. The effect of these C0-C3 constructs on actomyosin motility was characterized in both the unloaded in vitro motility assay and in the load-clamped laser trap assay where force:velocity (F:V) relations were obtained. In the motility assay, phosphomimetic replacement (i.e. aspartic acid) reduced the slowing of actin velocity observed in the presence of C0-C3 in proportion to the total number phosphomimetic replacements. Under load, C0-C3 depressed the F:V relationship without any effect on maximal force. Phosphomimetic replacement reversed the depression of F:V by C0-C3 in a graded manner with respect to the total number of replacements. Interestingly, the effect of C0-C3 on F:V was well fitted by a model that assumed C0-C3 acts as an effective viscous load against which myosin must operate. This study suggests that increasing phosphorylation of cMyBP-C incrementally reduces its modulation of actomyosin motion generation providing a tunable mechanism to regulate cardiac function.
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Affiliation(s)
- Abbey E Weith
- Department of Molecular Physiology & Biophysics, University of Vermont, HSRF, Room 116, 149 Beaumont Ave., Burlington, VT 05405, USA
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de Tombe PP, Granzier HL. The cytoskeleton and the cellular transduction of mechanical strain in the heart: a special issue. Pflugers Arch 2011; 462:1-2. [PMID: 21594569 DOI: 10.1007/s00424-011-0976-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2011] [Revised: 05/05/2011] [Accepted: 05/06/2011] [Indexed: 01/15/2023]
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