1. From the Allegheny General Hospital, Pittsburgh, Pa (R.L.B.); ICON Clinical Research, San Francisco, Calif (D.P.M., A.J.F.); University of Chicago Medical Center, Chicago, Ill (M.G.-M.); Mayo Clinic, Rochester, Minn (R.P.F., M.D.M.); University of Alabama at Birmingham (C.S.C.); Baylor College of Medicine, Houston, Tex (A.F.); Columbia University College of Physicians and Surgeons, New York, NY (R.J.B.); University of Colorado, Denver (D.B.B.); Intermountain Medical Center, Salt Lake City, Utah (C.G...