共 12 条
[6]
MCCAFFREY R M, 1964, Obstet Gynecol Surv, V19, P567, DOI 10.1097/00006254-196408000-00001
[7]
NELSON DM, 1983, OBSTET GYNECOL, V62, pS58
[10]
REEVES JT, 1986, AM REV RESPIR DIS, V134, P342