共 34 条
[1]
*AM COLL OBST GYN, 1999, ACOG TECHN B, V257
[2]
*AM COLL OBST GYN, 1989, ACOG TECHN B, V124
[3]
[Anonymous], INT STAT CLASS DIS R
[5]
*CDCP DIV REP HLTH, 2001, STRAT RED PREGN REL
[6]
[Centers for Disease Control and Prevention National Center for Injury Prevention and Control], WEBB INJ STAT QUER R