Participating sites Switzerland Bern Geneva Lugano Lucerne Aarau Germany Munich Giessen Erlangen Freiburg Bonn Göttingen Münster Berlin Essen Mannheim Lübeck Frankfurt Düsseldorf Mainz Würzburg Erfurt Kassel Aachen Rostock Austria Innsbruck Linz Spain Seville Barcelona (Bellvitge Hospital) Barcelona (Santa Creu i Sant Pau) Madrid France Paris Caen Finland Helsinki The Netherlands Utrecht Amsterdam Belgium Leuven Saint-Luc Sweden Gothenburg