1. Department of Public Health and Primary Care, University of Cambridge , Robinson Way, Cambridge CB2 0SR , UK
2. KU Leuven Department of Public Health and Primary Care, KU Leuven—University of Leuven , Kapucijnenvoer 7, PB7001, Leuven 3000 , Belgium
3. Department of Public Health and Primary Care, University of Cambridge , East Forvie Building, Cambridge CB2 0SR , UK
4. Department of Cardiology, Portsmouth Hospitals University NHS Trust , Portsmouth PO6 3LY , UK
5. Leicester Diabetes Centre, University Hospitals of Leicester NHS Trust , Infirmary Square, Leicester LE1 5WW , UK
6. Department of Cardiovascular Sciences, University of Leicester , University Road, Leicester LE1 7RH , UK
7. Heart Failure Offices, Ealing Community Cardiology, Imperial College NHS Trust , Praed Street, London W2 1NY , UK
8. Med 1, Klinikum Darmstadt , Grafenstraße 9, Darmstadt 64285 , Germany
9. Medical Library, University of Cambridge , Cambridge CB2 0QQ , UK
10. NMAHP Research Unit , Scion House, Stirling FK9 4NF , UK
11. Department of Public Health, Faculty of Health Sciences, University of Stavanger , Stavanger 4021 , Norway
12. NIHR Applied Research Collaborative (ARC) Wessex, Innovation Centre , Science Park, 2 Venture Rd, Chilworth, Southampton SO16 7NP , UK