1 The Second Hospital of Hebei Medical University, Shijiazhuang, Hebei, China.
2 Department of Endocrinology, Fuwai Hospital and Chinese Academy of Medical Sciences, Beijing 100037, China.
3 Department of Hypertension, Peking University People's Hospital, Beijing, China.
4 Department of Endocrinology and Metabolism, Peking University People's Hospital, Beijing, China.
5 Department of Endocrinology, Fuwai Hospital and Chinese Academy of Medical Sciences, Beijing 100037, China. Electronic address: guangwei_li45@126.com.