1. deCODE genetics/Amgen Inc, Reykjavík, Iceland
2. Faculty of Medicine, University of Iceland, Reykjavík, Iceland
3. Division of Cardiology, Landspítali–The National University Hospital of Iceland, Reykjavík, Iceland
4. Division of Cardiothoracic Surgery, Landspítali–The National University Hospital of Iceland, Reykjavík, Iceland
5. Department of Clinical Biochemistry, Landspítali–The National University Hospital of Iceland, Reykjavík, Iceland
6. Division of Heart & Lungs, Department of Cardiology, University Medical Center Utrecht, Utrecht University, Utrecht, the Netherlands
7. Röntgen Domus, Reykjavík, Iceland
8. The Laboratory in Mjódd, Reykjavík, Iceland
9. Department of Clinical Biochemistry, Akureyri Hospital, Akureyri, Iceland
10. School of Engineering and Natural Sciences, University of Iceland, Reykjavík, Iceland