1. Department of Endocrinology and Metabolism, The First Hospital of China Medical University, Shenyang, China.
2. Section of Endocrinology, Diabetes and Nutrition, Boston Medical Center, Boston, Massachusetts.
3. Department of Pathology, Boston Medical Center, Boston, Massachusetts.
4. Department of Global Health, Boston University School of Public Health, Boston, Massachusetts.
5. Department of Surgery, Boston Medical Center, Boston, Massachusetts.
6. Department of Surgery, Brigham and Women's Hospital, Boston, Massachusetts.