1. Department of Epidemiology , University of North Carolina at Chapel Hill Gillings School of Global Public Health , Chapel Hill, NC 27514 , USA ,
2. Department of Genetics , University of North Carolina at Chapel Hill School of Medicine , Chapel Hill, NC 27514 , USA ,
3. University College London Genetics Institute, Department of Genetics Environment and Evolution and
4. Center for Applied Genomics, Abramson Research Center, The Children's Hospital of Philadelphia , Philadelphia, PA 19104 , USA ,
5. Division of Epidemiology and Community Health , University of Minnesota School of Public Health , Minneapolis, MN 55454 , USA ,
6. Department of Epidemiology , University of Washington School of Public Health , Seattle, WA 98195 , USA ,
7. Department of Pharmaceutical Outcomes and Pharmacy , University of Florida College of Pharmacy , Gainesville, FL 32610 , USA ,
8. Department of Epidemiology and Population Health , London School of Hygiene and Tropical Medicine , London WC1E 7HT , UK ,
9. Genetic Epidemiology Group, Department of Epidemiology and Public Health , University College London , London WC1E 6BT , UK ,
10. Department of Pathology and Laboratory Medicine , University of Vermont College of Medicine , Burlington, VT 05405 , USA ,
11. National Heart, Lung and Blood Institute, National Institutes of Health , Bethesda, MD 20824 , USA and
12. Division of Hematology/Oncology , Northwestern University Feinberg School of Medicine , Chicago, IL 60611 , USA
13. Centre for Cardiovascular Genetics, BHF Laboratories, Institute of Cardiovascular Science , University College London , London WC1E 6JJ , UK ,