共 36 条
[1]
American College of Obstetricians and Gynecologists, 2012, OBSTET GYNECOL, V120, P983
[4]
Chandra Anjani, 2013, Natl Health Stat Report, P1
[5]
Clark L R, 2001, J Pediatr Adolesc Gynecol, V14, P153, DOI 10.1016/S1083-3188(01)00123-1