1. Department of Endocrinology & Metabolism, Peking University People’s Hospital, Beijing, PR China;
2. Department of Global Health Management and Policy, Tulane University School of Public Health and Tropical Medicine, New Orleans, LA, USA;
3. Center for Health Policy Studies, School of Public Health, Zhejiang University School of Medicine, Hangzhou, PR China;
4. School of Public Health, Fudan University, Shanghai, PR China;
5. Department of Endocrinology & Metabolism, Beijing Airport Hospital, Beijing, PR China