1 National Heart and Lung Institute, Imperial College, Dovehouse Street, London, SW3 6LY, UK. marek.malik@btinternet.com.
2 Medical Research Center, University Hospital of Oulu, and University of Oulu, Oulu, Finland.
3 UOC Malattie Cardiovascolari, Fondazione IRCCS Ospedale Maggiore Policlinico, Dipartimento di Scienze Cliniche e di Comunità, Università degli Studi di Milano, Milan, Italy.
4 Medizinische Klinik und Poliklinik, Klinikum rechts der Isar, Technische Universität München and German Center for Cardiovascular Research (DZHK), Munich, Germany.