1. From the University of Leipzig-Heart Center (G.H.), Leipzig, Germany; State Research Institute of Circulation Pathology (E.P.), Novosibirsk, Russia; The National Institute of Cardiovascular Diseases (L.U.), Bratislava, Slovakia; the Department of Cardiology (M.T.), Na Homolce Hospital, Prague, Czech Republic; the Department of Cardiology (K.-H.K.), Asklepios Klinik St Georg, Hamburg, Germany; Almazov Federal Center of the Heart, Blood, and Endocrinology (D.L.), St Petersburg, Russia; Medtronic (G.R....