Professor Amir H. Sam is Head of Imperial College School of Medicine, London, UK. He is a Consultant Physician and Endocrinologist at Hammersmith and Charing Cross hospitals, UK. Professor Karim Meeran is Head of Speciality for Endocrinology at Imperial College Healthcare NHS Trust, and Director of Teaching at Imperial College School of Medicine, London, UK. Dr Neil Hill is a Consultant in Diabetes, Endocrinology and General Internal Medicine at Imperial College Healthcare NHS Trust, UK.