1. From the Cardiology Department, University of Essen, Essen, Germany (M.H., D.B., R.E.); Ospedale di Circolo, Varese, Italy (E.V.); Academic Medical Center, Amsterdam, Netherlands (J.J.P.); Universitair Ziekenhuis, Antwerpen, Belgium (C.V.); and Kardiologische Universitätsklinik, Allgemeines Krankenhaus, Wien, Austria (P.P.).