1. Department of Infectious Diseases, Faculty of Medicine, Imperial College London , London , UK
2. Imperial College Healthcare NHS Trust , London , UK
3. Department of Epidemiology and Biostatistics, School of Public Health, Imperial College London , 90 Wood Ln, London W12 0BZ , UK
4. National Institute for Health Research Imperial Biomedical Research Centre, Imperial College London , The Bays, Entrance, 2 S Wharf Rd, London W2 1NY , UK
5. MRC Centre for Environment and Health, School of Public Health, Imperial College London , Praed Street, London W2 1NY , UK
6. British Heart Foundation Centre for Research Excellence, Imperial College London , South Kensington Campus, London SW7 2AZ , UK
7. Dementia Research Institute at Imperial College London , 86 Wood Ln, London W12 0BZ , UK
8. Health Data Research UK, Imperial College London , Exhibition Rd, South Kensington, London SW7 2AZ , UK
9. Department of Hygiene and Epidemiology, University of Ioannina Medical School , Ioannina , Greece