1. From the Cardiovascular Institute, University of Pittsburgh, Pittsburgh, Pa (B.L.); Department of Medicine, Brigham and Women’s Hospital, Boston, Mass (C.A.); Department of Medicine, University of Iowa, Iowa City (M.E.A.); Department of Kinesiology, University of Calgary, Calgary, Alberta, Canada (W.R.G.); Department of Cardiovascular Medicine, Cleveland Clinic Foundation, Cleveland, Ohio (D.R.V.W.); Department of Medicine, Tufts-New England Medical Center, Boston, Mass (E.B., M.C.); Department of...