1. Department of Clinical BiochemistryUniversity of CambridgeAddenbrooke's Hospital Cambridge UK
2. Cellular Regulation, MRC Dunn Human Nutrition Unit Cambridge UK
3. Ingenium Pharmaceuticals AG Martinsried Germany
4. Diabetes Research UnitBoston Medical Center Boston Massachusetts USA
5. Metabolic Research LaboratoryOxford Centre for Diabetes, Endocrinology and MetabolismNuffield Department of Clinical MedicineUniversity of OxfordChurchill Hospital Oxford UK
6. Department of BiochemistryUniversity of Cambridge Cambridge UK