1. Endocrinology and Metabolic Medicine, Faculty of Medicine (I.F.G., A.J.P., J.C.S.), and Wynn Department of Metabolic Medicine, London, United Kingdom W2 1NY
2. Division of Medicine (I.F.G., D.C., A.J.P., J.C.S.), Imperial College London, London, United Kingdom W2 1NY
3. Division of Primary Care and Public Health, Brighton and Sussex Medical School (D.C.), Brighton, United Kingdom BN1 9PH