1. Transplant Institute and Department of Cardiothoracic Surgery; Sahlgrenska University Hospital, University of Gothenburg; SE-413 45 Gothenburg Sweden
2. Department of Cardiothoracic Surgery; Oslo University Hospital, University of Oslo; Oslo Norway
3. Department of Cardiothoracic Surgery; Helsinki University Hospital; Helsinki Finland
4. Department of Cardiology; Rigshospitalet; Copenhagen Denmark
5. Department of Cardiology; Århus University Hospital; Århus Denmark
6. Department of Cardiothoracic Surgery; Lund University Hospital; Lund Sweden
7. Department of Cardiology; Karolinska University Hospital; Stockholm Sweden
8. Department of Cardiology; Sahlgrenska University Hospital; Gothenburg Sweden