1. From the Greenberg Division of Cardiology, Weill Cornell Medical College, New York, NY (P.M.O., C.N.B., R.B.D.); the Department of Cardiology, Gentofte Hospital, Copenhagen, Denmark (K.W.); Merck Research Labs, West Point, PA (D.A.H.); University of Oslo, Ullevål Hospital, Oslo, Norway (S.E.K.); University of Michigan Medical Center, Ann Arbor, MI (S.E.K.); Sahlgrenska University Hospital/Östra, Göteborg, Sweden (B.D.).