1. Cardiocenter, Third Faculty of Medicine, Charles University, Hospital Kralovske Vinohrady, Ruska 87, Prague 10, Czech Republic
2. Department of Cardiovascular and Thoracic Sciences, Policlinico A. Gemelli–IRCCS, Catholic University, Roma, Italy
3. Cardiology and Intensive Care, University Teaching Hospital Klinikum Wels Grieskirchen, A-4600 Wels, Austria
4. Royal Brompton and Harefield Hospitals and Imperial College, London, UK
5. Center for Molecular Cardiology, University of Zurich, Zurich, Switzerland