Search results for: Hai-Yan Zhang
European Journal of Obstetrics and Gynecology > 2009 > 146 > 1 > 81-86
European Journal of Obstetrics and Gynecology > 2008 > 139 > 2 > 237-244
European Journal of Obstetrics and Gynecology > 2009 > 146 > 1 > 81-86
European Journal of Obstetrics and Gynecology > 2008 > 139 > 2 > 237-244