1. Finnish Red Cross Blood Service Helsinki Finland
2. British Heart Foundation Cardiovascular Epidemiology Unit, Department of Public Health and Primary Care University of Cambridge Cambridge UK
3. Heart and Lung Research Institute University of Cambridge Cambridge UK
4. National Institute for Health and Care Research Blood and Transplant Research Unit in Donor Health and Behaviour University of Cambridge Cambridge UK
5. British Heart Foundation Centre of Research Excellence University of Cambridge Cambridge UK
6. Health Data Research UK Cambridge Wellcome Genome Campus and University of Cambridge Cambridge UK