1. From the Toronto General Research Institute, Division of Cardiac Surgery, University of Toronto, Toronto General Hospital, Toronto, Ontario, Canada (P.W.M.F., S.M.A., A.P.W., M.S., R.D.W., R.L.); Kaufman Center for Heart Failure, Department of Thoracic and Cardiovascular Surgery, The Cleveland Clinic Foundation, Cleveland, Ohio (C.S.M.); Bluhm Cardiovascular Institute, Feinberg School of Medicine, Division of Cardiothoracic Surgery, Northwestern University, Chicago, Ill (P.M.M.); and St Michael’s...