Department of Obstetrics and Gynecology, Nanfang Hospital, Southern Medical University,, Department of Obstetrics and Gynecology, Foshan First People's Hospital, Southern Medical University, Zhujiang Hospital, Department of Obstetrics and Gynecology, Nanfang Hospital, Southern Medical University, Department of Obstetrics and Gynecology, Nanfang Hospital, Southern Medical University,, Department of Pathology, Foshan First People's Hospital, Southern Medical University, Zhujiang Hospital, Department of Obstetrics and Gynecology, Nanfang Hospital, Southern Medical University, Department of Obstetrics and Gynecology, Nanfang Hospital, Southern Medical University, Department of Obstetrics and Gynecology, Nanfang Hospital, Southern Medical University,, Department of Obstetrics and Gynecology, Nanfang Hospital, Southern Medical University,, Department of Obstetrics and Gynecology, Nanfang Hospital, Southern Medical University, Southern Medical University - Department of Gynaecology and Obstetrics, Department of Obstetrics and Gynecology, Nanfang Hospital, Southern Medical University, Southern Medical University - Department of Gynaecology and Obstetrics and Department of Obstetrics and Gynecology, Nanfang Hospital, Southern Medical University

Southern Medical University - Department of Infectious Diseases, Southern Medical University - Department of Infectious Diseases, Southeast University, Capital Medical University - Beijing YouAn Hospital, Government of the People's Republic of China - Fifth Medical Centre, Southern Medical University - Fifth Affiliated Hospita, Southern Medical University - Department of Gynaecology and Obstetrics, Southern Medical University - Department of Gynaecology and Obstetrics, Jiujiang Maternal and Child Care Center, Southern Medical University, Zhujiang Hospital, Third People’s Hospital of Jiujiang, Southern Medical University - Third Affiliated Hospital, Guangzhou Medical University - Guangzhou Eighth People's Hospital, Southern Medical University - Department of Infectious Diseases, World Health Organization (WHO) - Western Pacific Region (WPRO), World Health Organization (WHO), Peking University, School of Public Health, Department of Laboratorial Science and Technology, Peking University - Department of Microbiology and Infectious Disease and Southern Medical University - State Key Laboratory of Organ Failure Research