1. From the Department of Interventional Cardiology, Rigshospitalet, Copenhagen, Denmark (O.D.B, O.W.F, L.S.); Department of Interventional Cardiology, McGill University Health Centre, Montreal, Quebec, Canada (N.P.); Department of Interventional Cardiology, Tel Aviv Medical Center, Tel Aviv, Israel (S.B.); Department for Experimental Cardiac Surgery and Heart Valve Replacement, University of Kiel, Kiel, Germany (G.L.); Department of Cardiology, University Hospital Zurich, Zurich, Switzerland (F.M.);...