Search results for: Xu Chen
European Journal of Obstetrics and Gynecology > 2013 > 171 > 2 > 319-324
European Journal of Obstetrics and Gynecology > 2013 > 171 > 2 > 362-367
European Journal of Obstetrics and Gynecology > 2013 > 171 > 2 > 319-324
European Journal of Obstetrics and Gynecology > 2013 > 171 > 2 > 362-367