1. The Department of Nutrition and Food Hygiene, School of Public Health, Tianjin Medical University, Tianjin, China
2. Tianjin Institution of Endocrinology, Tianjin Medical University, Tianjin, China
3. Section of Endocrinology, Diabetes, and Nutrition, Boston University School of Medicine, Boston, MA
4. The Shandong Institute for Endemic Disease Control and Research, Shangdong Province, China