1. From Departments of Cardiology (E.J., G.E.H., V.K., P.D., S.K., A.M., J.J.B., V.D.) and Medical Statistics (B.M.), Leiden University Medical Center, The Netherlands; Department of Cardiovascular Medicine, Cleveland Clinic, OH (E.J.); Department of Cardiology, AHEPA University Hospital, Thessaloniki, Greece (V.K.); and Department of Cardiology, Sint-Jan Hospital, Bruges, Belgium (P.D.).