Affiliation: | Department of Cardiac Sciences (Raj, Sheldon), Libin Cardiovascular Institute, Cumming School of Medicine, University of Calgary, Calgary, Alta.; Autonomic Dysfunction Center (Raj), Division of Clinical Pharmacology, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tenn.; Department of Cardiology (Fedorowski), Karolinska University Hospital; Department of Medicine (Fedorowski), Karolinska Institute, Stockholm, Sweden |