1. Department of Metabolic Medicine/Chemical Pathology; Guy's & St Thomas’ Hospitals; St Thomas’ Hospital; London UK
2. Nutristasis Unit; Viapath; Guy's & St Thomas’ Hospitals; St Thomas’ Hospital; London UK
3. Department of Upper Gastrointestinal Surgery; Guy's & St Thomas’ Hospitals; St Thomas’ Hospital; London UK
4. Department of Diabetes & Endocrinology; Guy's & St Thomas’ Hospitals; St Thomas’ Hospital; London UK