1. From the Division of Cardiovascular Diseases, Department of Medicine, Mayo Clinic, Rochester, MN (E.L.H., A.S., E.R.F., H.R.V., R.P.F., M.D.M., J.K.O., N.M.A., H.M.C., B.W.E., P.A.P., G.C.K.); and Division of Cardiovascular Diseases, Bangkok Heart Hospital, Bangkok, Thailand (A.S.).