1. From the Tel Aviv Sourasky Medical Center (U.R., S.L., H.I.M.), Tel Aviv, Israel; Hanusch KH (G. Gaul), Vienna, Austria; Universitatsklinikum Essen (R.E.), Essen, Germany; Universitaatsspital Zurich (F.A.), Zurich, Switzerland; Medellin Clinic (D.V.), Medellin, Colombia; Herzzentrum Frankfurt (H.S.), Frankfurt, Germany; Uni Kiel (R.S.), Kiel, Germany; Shaio Clinic (G. Gomez), Bogata, Colombia; Stadt Klinikum Oldenburg (J.T.), Oldenburg, Germany; Centro Cardiologico Milan (A.B.), Milan, Italy;...