共 52 条
[2]
ALLEN UD, 1993, CAN MED ASSOC J, V149, P1659
[3]
*AM COLL OBST GYN, 1996, ACOG COMM OPIN, V173, P1
[5]
[Anonymous], 1992, Pediatrics, V90, P775
[8]
Baker C.J., 1995, INFECT DIS FETUS NEW, V37, P980