1. National Heart and Lung Institute, Imperial College; London UK
2. Research Unit of Internal Medicine, University Central Hospital and University of Oulu; Oulu Finland
3. Dipartimento di Scienze Cliniche e di Comunità; Cardiologia, Fondazione IRCCS Ospedale Maggiore Policlinico, University of Milan; Italy
4. Innere Medizin I, Klinikum rechts der Isar, Technische Universität München; München Germany
5. Department of Cardiology; Pneumology-Heart Center, University of Göttingen Medical Center; Göttingen Germany