1. From the Division of Cardiovascular Medicine, Brigham and Women’s Hospital, Boston, MA (D.E.F., E.W., K.M.D.); Heart Failure Unit, I.R.C.C.S Policlinico San Donato, University of Milano, Department of Biomedical Sciences for Health, Milano, Italy (M.G.); Division of Cardiology, VA Palo Alto Healthcare System, Palo Alto, CA (J.M.); Lebauer Cardiovascular Research Foundation, Greensboro, NC (P.C., D.B.); Department of Physical Therapy, University of Miami, Miami, FL (L.P.C.); Department of Internal...