1. From the Hospital Gregorio Marañon (C.H., J.A., M.O.), Madrid, Spain; University of Bonn (J.O.S.), Bonn, Germany; Ludwig-Maximilians-University Munich (S.J.), Munich, Germany; RWTH Aachen University (K.M.), Aachen, Germany; Hospital 12 de Octubre (F.A.), Madrid, Spain; University of Mannheim (C.W.), Mannheim, Germany; Hospital San Filippo Neri (R.R.), Rome, Italy; Hospital Santa Cruz (P.A.), Carnaxide, Portugal; Universidad Politecnica de Cataluña (E.C.), Barcelona, Spain; Medtronic (X.N.),...