1. Department of Nutrition and Food Hygiene, National Key Discipline, School of Public Health, Harbin Medical University, Harbin, China
2. Department of Endocrinology, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
3. Medical University of South Carolina, Charleston, SC
4. Department of Epidemiology, School of Public Health and Tropical Medicine, Tulane University, New Orleans, LA