Affiliation: | aSection of Cardiology, Medical Service, WJB Dorn Veterans' Affairs Medical Center, the WJB Dorn Research Institute, Columbia, SC, USA;bDepartment of Medicine, University of South Carolina School of Medicine, Columbia, SC, USA;cDepartment of Physiology, University of South Carolina School of Medicine, Columbia, SC, USA;dDepartment of Medicine, University of California, Irvine, CA, USA |