1. The University of Nottingham; Division of Primary Care, School of Medicine; Floor 13, Tower Building University Park Nottingham UK NG7 2RD
2. University of Nottingham; School of Medicine, Division of Primary Care; Queen's Medical Centre (B-Floor) Derby Road Nottingham UK NG2 6SN
3. Maastricht University; Department of Health Services Research and CAPHRI School for Public Health and Primary Care; P O Box 616 Maastricht Netherlands 6200 MD
4. Glasgow Caledonian University; School of Health & Life Sciences, Institute of Applied Health Research; Cowcaddens Rd Glasgow UK G4 0BA
5. University College London; Research Department of Primary Care and Population Health; Faculty of Biomedical Sciences Royal Free Campus, Rowland Hill Street London UK NW3 2PF
6. University of Surrey; School of Economics; Guildford Surrey UK GU2 7XH
7. Nottingham University Hospitals NHS Trust; Queens Medical Centre Campus Nottingham UK NG7 2UH
8. University of Southampton; Faculty of Health Sciences; Building 45 Highfield Campus Southampton UK SO17 1BJ
9. Fitness for a Certain Age; London UK
10. University of Bristol; School of Social and Community Medicine; Canynge Hall 39 Whatley Road Bristol UK BS8 2PS
11. Royal Free Campus, UCL Medical School; Research Department of Primary Care and Population Health; London UK
12. University of New South Wales; Neuroscience Research Australia; Barker Street Randwick, Sydney New South Wales Australia 2223