1. Centre for Endocrinology; William Harvey Research Institute; Barts and the London School of Medicine and Dentistry; Queen Mary University of London; London UK
2. Department of Endocrinology; Universitat Autònoma de Barcelona; Barcelona Spain
3. Clinical Genetics Department; Great Ormond Street Hospital; London UK
4. Pancreatic and Endocrine Surgery Department; University College London Hospitals; London UK
5. Department of Paediatric and Adolescent Endocrinology; University College London Hospitals; London UK
6. Lady Davis Institute of the Jewish General Hospital; McGill University; Montreal Canada
7. Department of Medical Genetics; Research Institute of the McGill University Health Centre; McGill University; Montreal Canada