1. From the Cardiovascular Division, Brigham and Women’s Hospital, Boston, MA (A.G., C.-L.H., B.C., K.N., S.C., A.M.S., S.D.S.); Department of Physiology and Cardiovascular Surgery, University of Porto Medical School, Porto, Portugal (A.G.); Division of Cardiology, Department of Internal Medicine, Mackay Memorial Hospital, Taipei, Taiwan (C.-L.H.); and Department of Cardiology, Wake Forest School of Medicine, Winston-Salem, NC (D.W.K.).