Department of Endocrinology and Metabolism, Peking University People's Hospital, Beijing, China. Electronic address: xingyunzhu427@gmail.com. Department of Endocrinology and Metabolism, Peking University People's Hospital, Beijing, China. Electronic address: chulin@bjmu.edu.cn. Department of Endocrinology and Metabolism, Peking University People's Hospital, Beijing, China. Electronic address: beijing2014_lili@163.com. Department of Endocrinology and Metabolism, Peking University People's Hospital, Beijing, China. Electronic address: 1510301223@pku.edu.cn. Department of Endocrinology and Metabolism, Peking University People's Hospital, Beijing, China. Electronic address: dr_junel@sina.com. Department of Endocrinology and Metabolism, Peking University People's Hospital, Beijing, China. Electronic address: jiln@bjmu.edu.cn.