American Journal of Obstetrics and Gynecology
American Journal of Obstetrics and Gynecology > 1995 > 172 > 4 Part 1 > 1138-1149
American Journal of Obstetrics and Gynecology > 1998 > 179 > 4 > 971-973
American Journal of Obstetrics and Gynecology > 1995 > 172 > 4 Part 1 > 1138-1149
American Journal of Obstetrics and Gynecology > 1998 > 179 > 4 > 971-973