1. Department of Medicine, Medical School, University of Newcastle upon Tyne, Newcastle upon Tyne, U.K.
2. Sheffield Kidney Institute, Northern General Hospital Trust, Sheffield, U.K.
3. Mario Negri Institute for Pharmacological Research, Bergamo, Italy
4. Diabetes Unit, Hospital Brotzu, Cagliari, Italy
5. Division and Research Unit of Endocrinology, “Casa Sollievo della Sofferenza” Hospital, San Giovanni Rotondo, Italy
6. Department of Diabetes, Endocrinology & Internal Medicine, Guy’s Hospital, King’s College London, London, U.K.