American Journal of Obstetrics and Gynecology
American Journal of Obstetrics and Gynecology > 1995 > 173 > 4 > 1106-1110
American Journal of Obstetrics and Gynecology > 2001 > 184 > 6 > 1284-1288
American Journal of Obstetrics and Gynecology > 1995 > 173 > 4 > 1106-1110
American Journal of Obstetrics and Gynecology > 2001 > 184 > 6 > 1284-1288