共 15 条
[1]
ACOG Committee on Practice Bulletins-Gynecology, 2005, Obstet Gynecol, V105, P223
[2]
[Anonymous], 2004, MED EL CRIT CONTR US, VThird
[3]
[Anonymous], 2004, COCHRANE DB SYST REV
[4]
Curtis Kathryn M., 2010, Morbidity and Mortality Weekly Report, V59, P1
[7]
Guttmacher Institute, FACTS IND AB US BRIE

