School of Medicine, Nankai University, No. 94 Weijin Road, Tianjin, 300071, China. Department of Endocrinology, Chinese People's Liberation Army General Hospital, No. 28 Fuxing Road, Beijing, 100853, China. Department of Endocrinology, Dalian Municipal Central Hospital, No. 826 Southwest Shahekou District Road, Dalian, 116033, China. Department of Endocrinology, First Hospital of Lanzhou University, No. 1 Donggang West Road, Lanzhou, 730000, China. Department of Endocrinology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, No. 107 Yanjiang West Road, Guangzhou, 510120, China. Department of Endocrinology, Affiliated Hospital of Luzhou Medical College, No. 25 Taiping Road, Luzhou, 646000, China. Department of Endocrinology, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, No. 197 Ruijin 2nd Road, Shanghai, 200025, China. Department of Endocrinology, First Affiliated Hospital of Guangxi Medical University, No. 6 Shuangyong Road, Nanning, 530021, China. Department of Endocrinology, First Affiliated Hospital of Zhengzhou University, No. 1 Jianshe Road, Zhengzhou, 450052, China. Department of Endocrinology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, No. 1277 Jiefang Avenue, Wuhan, 430030, China. School of Medicine, Nankai University, No. 94 Weijin Road, Tianjin, 300071, China. muyiming@301hospital.com.cn. Department of Endocrinology, Chinese People's Liberation Army General Hospital, No. 28 Fuxing Road, Beijing, 100853, China. muyiming@301hospital.com.cn.