共 28 条
[2]
Cramer D, 1980, Acta Cytol, V24, P478
[3]
CRAMER DW, 1979, OBSTET GYNECOL, V54, P521
[4]
Davies J L, 1981, Obstet Gynecol Surv, V36, P107, DOI 10.1097/00006254-198103000-00001
[5]
FAKTA NM, 1977, NORD MED, V92, P8
[6]
GAMBRELL RD, 1981, CONTEMP OBSTET GYNEC, V17, P133
[7]
GRAY LA, 1977, OBSTET GYNECOL, V49, P385
[8]
GREENWALD P, 1977, NEW YORK STATE J MED, V77, P1069
[10]
HOOVER R, 1976, N ENGL J MED, V295, P402