共 5 条
[2]
DUFF P, 1997, INFECT DIS, P21
[3]
HEMSELL DL, 1991, REV INFECT DIS, V13, pS821
[4]
MITTENDORF R, 1994, AM J OBSTET GYNECOL, V171, P281, DOI 10.1016/0002-9378(94)90496-0