[1] Peking Union Medical College Hospital,Department of Obstetrics and Gynecology
[2] Chinese Academy of Medical Sciences & Peking Union Medical College,Department of Epidemiology and Biostatistics Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences & School of Basic Medicine
[3] National Clinical Research Center for Obstetric & Gynecologic Diseases,undefined
[4] Eight-year M.D. program,undefined
[5] Chinese Academy of Medical Sciences & Peking Union Medical College,undefined
[6] Peking Union Medical College,undefined