1. From the Division of Cardiovascular Medicine, Stanford University Medical Center, Stanford, CA (W.F.F., A.S.Y., M.G.S., M. Y. H., H.-S.K.); National University Heart Centre, Singapore (A.F.L., J.P.L.); and Department of Cardiology, Golden Jubilee National Hospital, Glasgow, Scotland (R.M., C.B., K.G.O.).