Stanford University, Palo Alto, California, United States
Department of Obstetrics and Gynecology, the Eighth Affiliated Hospital, Sun Yat-sen University;, Shenzhen, Guangdong, China
Department of Obstetrics, Shenzhen Maternity and Child Healthcare Hospital, Shenzhen, Guangdong, China
Department of Obstetrics and Gynecology, The Third Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
the Eighth Affiliated Hospital, Shenzhen, Guangdong, China
The Third Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
Hunan Provincial Maternal and Child Health Care Hospital, Changsha, Hunan, China