1. Department of Endocrinology, Beijing Hospital, National Center of Gerontology, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing, China
2. Department of Endocrinology, The Third Affiliated Hospital of Jinzhou Medical University, Jinzhou, Liaoning, China
3. Department of Endocrinology, Nanyang Central Hospital, Nanyang, Henan, China
4. Department of Endocrinology, Henan Provincial People’s Hospital, Zhengzhou, Henan, China
5. Department of Endocrinology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
6. Department of Endocrinology, Hebei Provincial People’s Hospital, Shijiazhuang, Hebei, China
7. Department of Endocrinology, The Second Hospital of Hebei Medical University, Shijiazhuang, Hebei, China
8. Department of Endocrinology, Sir Run Run Hospital, Nanjing Medical University, Nanjing, China
9. Department of Endocrinology, The First Affiliated Hospital of Soochow University, Soochow, Jiangsu, China
10. Department of Clinical Nutrition, Beijing Tongren Hospital, Capital Medical University, Beijing, China