[1] Cumming School of Medicine,Department of Cardiac Sciences
[2] Libin Cardiovascular Institute,Department of Neurology
[3] University of Calgary,Department of Psychiatry
[4] UT Southwestern Medical Center,Department of Medicine, Autonomic Dysfunction Center
[5] Cumming School of Medicine,Neural and Behavioral Sciences
[6] University of Calgary,undefined
[7] Vanderbilt University Medical Center,undefined
[8] Penn State College of Medicine,undefined