1. Department of Medicine; Karolinska Institutet; Stockholm Sweden
2. Department of Cardiology; Karolinska University Hospital; Stockholm Sweden
3. Institut du Thorax, Inserm UMR 1087-CIC1413; Centre Hospitalier Universaire de Nantes; Nantes France
4. UZ Leuven; Leuven Belgium
5. Erasmus MC University Medical Center; Rotterdam The Netherlands
6. University Hospital of S. Manchester NHS Trust; Manchester UK
7. Department of Cardiac, Thoracic, Transplantation and Vascular Surgery; Hannover Medical School; Hannover Germany
8. German Heart Competance Center; University Clinical Center Tuebingen; Tuebingen Germany
9. St Jude Medical; Minneapolis MN USA
10. Department of Cardiology; Copenhagen University Hospital Rigshospitalet; Copenhagen Denmark