Search results for: Zhi Liu
American Journal of Obstetrics and Gynecology > 2000 > 183 > 1 > 181-187
American Journal of Obstetrics and Gynecology > 1999 > 180 > 3 > 696-702
American Journal of Obstetrics and Gynecology > 1998 > 178 > 2 > 234-241