1. From the Cardiovascular Division (E.F.L., S.D.S., E.B., M.A.P.), Brigham and Women’s Hospital, Boston, Mass; Biostatistics Center (K.A.J., M.M.R.), George Washington University, Washington, DC and Rockville, Md; Mediterranean Institute for Transplantation and Advanced Specialized Therapies (F.C.), Palermo, Italy; Astra Zeneca (J.H.), Wilmington, Del; AMNCO Foundation (A.P.M.), Florence, Italy; Department of Medicine (M.Z.), University of Texas Health Science Center, San Antonio, Tex; Montreal...