共 92 条
[21]
HALL CB, 1992, PEDIATRICS, V90, P775
[23]
HIBBARD JU, 1993, J REPROD MED, V38, P945
[29]
Kilbride HW, 1996, AM J OBSTET GYNECOL, V175, P675
[30]
KLEIN JM, 1992, OBSTET GYN CLIN N AM, V19, P265