Rambam Medical Center, Haifa, Israel (A.R., E.M.). Piedmont Heart Institute, Atlanta, GA (D.E.K.). Catharina Hospital, Eindhoven, the Netherlands (J.J.K.). Baim Institute for Clinical Research, Boston, MA (G.D.). Department of Biostatistics and Epidemiology, Boston University School of Public Health, MA (J.M.M.). Division of Interventional Cardiology, MedStar Cardiovascular Research Network, MedStar Washington Hospital Center, DC (H.M.G.-G., R.W.). Department of Cardiovascular Medicine, University Hospitals Leuven, Belgium (J.B.). Charleston Area Medical Center, WV (E.G.G.). Beth Israel Deaconess Medical Center, Baim Institute for Clinical Research, Boston, MA (D.E.C.).