1. Department of Endocrinology, Singapore General Hospital, Singapore, Singapore.
2. Department of Gastroenterology & Hepatology, Singapore General Hospital, Singapore, Singapore.
3. Laboratory of Hormonal Regulation, Cardiovascular and Metabolic Disorders Program, Duke-National University of Singapore (NUS) Medical School, Singapore, Singapore.
4. Department of Internal Medicine, Duke University School of Medicine, Durham, North Carolina, USA.
5. Duke Molecular Physiology Institute, Duke University School of Medicine, Durham, North Carolina, USA.