1. University of Oxford; Nuffield Department of Population Health; CTSU, Richard Doll Building, Old Road Campus Roosevelt Drive, Headington Oxford Oxfordshire UK OX3 7LF
2. Norfolk & Norwich University Hospitals; Department of Older People's Medicine; Colney Lane Norwich UK NR4 7UY
3. John Radcliffe Hospital; Department of General Medicine; Headley Way Oxford UK OX3 9DU
4. University of Amsterdam; Amsterdam Institute for Social Science Research; Nieuwe Achtergracht 166, Building C, C5.02 Amsterdam Netherlands 1018 WV
5. Hospital Clínic-University of Barcelona; Barcelona Institute for Global Health; Carrer del del Rosselló, 132 Barcelona Spain
6. University of East Anglia; Faculty of Medicine and Health Sciences; Chancellor's Drive Norwich Norfolk UK NR4 7TJ
7. University of East Anglia; Norwich Medical School; Norwich UK NR4 7TJ