1. From the Division of Cardiology (N.F.E., R.G., D.W., L.J., H.R., M.T.M.) and Department of Internal Medicine (C.E.), Kantonsspital St. Gallen, St. Gallen; Clinic for Cardiovascular Surgery (S.S., V.F.), and Institute of Surgical Pathology (S.T.), University Hospital Zurich, Zurich; all in Switzerland.