1 Hematological Research Group, Department of Clinical Medicine, University of Tromsø, Tromsø, Norway.
2 Section for Epidemiology, Department of Public Health, Aarhus University, Aarhus, Denmark.
3 Hematological Research Group, Department of Clinical Medicine, University of Tromsø, Tromsø, Norway, Division of Internal Medicine, University Hospital of North Norway, Tromsø, Norway.
4 Department of Haematology, Aalborg University Hospital, Aalborg, Denmark.
5 Department of Clinical Biochemistry, Cardiovascular Research Center, Aalborg University Hospital, Aalborg, Denmark.
6 Brain and Circulation Research Group, Department of Clinical Medicine, University of Tromsø, Tromsø, Norway, Department of Neurology and Clinical Neurophysiology, University Hospital of North Norway, Tromsø, Norway.
7 Department of Community Medicine, University of Tromsø, Tromsø, Norway.
8 Department of Clinical Epidemiology, Leiden University Medical Center, Leiden, The Netherlands.
9 Section for Epidemiology, Department of Public Health, Aarhus University, Aarhus, Denmark, Department of Cardiology, Aalborg University Hospital, Aalborg, Denmark.