共 29 条
[3]
BALCOM RJ, 1993, PEDIATRICS, V91, P540
[4]
Behrman R. R., 2007, PRETERM BIRTH CAUSES
[5]
CHASE HC, 1972, VITAL HLTH STAT, V3
[7]
Committee OPQCW, 2010, AM J OBSTET GYNECOL, V202, pe1
[8]
Creasy R.K., 2008, Creasy Resnik's Maternal-Fetal Medicine: Principles and Practice, V6th