1 Department of Non-Communicable Disease Epidemiology, Faculty of Epidemiology and Population Health, London School of Hygiene & Tropical Medicine, London, UK.
2 Clinical Practice Research Datalink (CPRD) Medicines and Healthcare products Regulatory Agency, London, UK.
3 Department of Emergency Medicine, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland.
4 Institute of Health Economics and Clinical Epidemiology, University Hospital of Cologne, Cologne, Germany.
5 Department of Medicine, The Royal Marsden NHS Foundation Trust, London and Surrey, UK.