1. Department of Endocrinology; The Xiangya Hospital of Central South University; Changsha Hunan China
2. Department of Gerontology; The Xiangya Hospital of Central South University; Changsha Hunan China
3. Institute of Endocrinology and Metabolism; The Second Xiangya Hospital of Central South University; Changsha Hunan China
4. Department of Orthopedics; The Xiangya Hospital of Central South University; Changsha Hunan China