1. Research Department of Epidemiology and Public Health University College London London UK
2. British Heart Foundation Cardiovascular Epidemiology Unit, Department of Public Health and Primary Care University of Cambridge, Strangeways Research Laboratory Cambridge UK
3. National Institute for Health Research Blood and Transplant Unit in Donor Health and Genomics at the University of Cambridge, Strangeways Research Laboratory Cambridge UK
4. Stroke Research Group, Department of Clinical Neurosciences Cambridge Biomedical Campus Cambridge UK