1. From the Department of Cardiology (J.O.L., K.A.S., T.S., J.C.B., J.W.B., P.B.B.) and Center for Clinical Studies (P.B.B.), Geisinger Medical Center, Danville, Pa; and Divisions of Cardiovascular Diseases (P.J.M.B.) and Allergic Diseases (J.H.B.), Mayo Clinic, Rochester, Minn.