1 Department of Medicine, University of Manitoba, Winnipeg, Manitoba, Canada; Department of Physiology & Pathophysiology, University of Manitoba, Winnipeg, Manitoba, Canada; Department of Pharmacology & Therapeutics, University of Manitoba, Winnipeg, Manitoba, Canada; Cardiac Sciences Program, Winnipeg Regional Health Authority, Winnipeg, Manitoba, Canada. Electronic address: rfeldman@sbgh.mb.ca.
2 Department of Medicine and Robarts Research Institute, Schulich School of Medicine and Dentistry, University of Western Ontario, London, Ontario, Canada.