1. K.G.Jebsen Thrombosis Research and Expertise Center (TREC); Department of Clinical Medicine; UiT the Arctic University of Norway; Tromsø Norway
2. Hematological Research Group (HERG); Department of Clinical Medicine; UiT the Arctic University of Norway; Tromsø Norway
3. Division of Internal Medicine; University Hospital of North Norway; Tromsø Norway
4. National Center on Birth Defects and Developmental Disabilities; Centers for Disease Control and Prevention; Atlanta GA USA
5. National Center for Chronic Disease Prevention and Health Promotion; Centers for Disease Control and Prevention; Atlanta GA USA
6. Department of Clinical Epidemiology; Leiden University Medical Center; Leiden the Netherlands
7. Department of Hematology; Trondheim University Hospital; Trondheim Norway
8. HUNT Research Centre; Department of Public Health and General Practice; Norwegian University of Science and Technology; Levanger Norway
9. Research Group Epidemiology of Chronic Diseases; Department of Community Medicine; UiT the Arctic University of Norway; Tromsø Norway