Peking University, Peking University - Department of Epidemiology and Biostatistics, Chinese Centre for Disease Control and Prevention, Peking University - Peking University Third Hospital and Peking University - Department of Epidemiology and Biostatistics

Peking University, Qingdao University - Yantai Yuhuangding Hospital, Peking University, Peking University, Peking University, Peking University, Peking University, Peking University, Peking University, Anhui Medical University, Anhui Medical University, Zhengzhou University, Zhengzhou University, NanKai University - Tianjin Central Hospital of Obstetrics and Gynecology, Lanzhou University, Guangxi Medical University - Center of Reproductive Medicine, Qingdao University, Qingdao University - Yantai Yuhuangding Hospital, Fudan University, Zhejiang University of Technology, Kunming University of Science and Technology, Capital Medical University - Beijing Tiantan Hospital, Peking University, Zhengzhou University, NanKai University - Tianjin Central Hospital of Obstetrics and Gynecology, Lanzhou University, Guangxi Medical University - Center of Reproductive Medicine, Qingdao University - Yantai Yuhuangding Hospital, Qingdao University, Anhui Medical University and Capital Medical University - Beijing Chaoyang Hospital