1. From the Department of Cardiology, Asklepios Klinik St. Georg, Hamburg, Germany (C.-H.H., A.W., A.M.S., A.M., A.R., P.W., B.R., C.L., T.M., F.S., J.R., S.M., K.-H.K.); University Heart Center Luebeck, Germany (R.R.T., C.-H.H.); Department of Cardiology, Charité, Universitätsmedizin Berlin, Campus Benjamin Franklin, Germany (A.R.); and Electrophysiology Bremen, Heart Center Bremen, Germany (C.S.).