1. From the Heart Failure and Transplantation Program, Toronto General Hospital, University Health Network, Ontario, Canada (A.C.A., H.J.R.); Department of Clinical Epidemiology and Biostatistics, McMaster University, Hamilton, Ontario, Canada (T.A., S.D.W., G.H.G.); Department of Internal Medicine, Jagiellonian University Medical College, Krakow, Poland (M.J.); and Center for Health Behavior Monitoring and Intervention, University of Rhode Island, Kingston, RI (D.C.).