1. Department of Medicine (T.I., G.K., J.R., N.S., S.K., B.S., D.R., S.B., B.C., A.N., N.N., G.S., N.U.), University of Chicago Medical Center, IL.
2. Department of Surgery (V.J., T.O., T.S., C.J.), University of Chicago Medical Center, IL.
3. Department of Medicine, Brigham and Women’s Hospital, Boston, MA (M.M.).
4. Advocate Heart Institute, Naperville, IL (M.R.C.).
5. Department of Medicine, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, NY (U.P.J.).
6. Columbia University Medical Center, and Cardiovascular Research Foundation, New York, NY (D.B).