共 17 条
[1]
DISCHE MR, 1979, AM J CLIN PATHOL, V72, P167
[2]
EMBREE JE, 1980, OBSTET GYNECOL, V56, P475
[3]
FLEISS JL, 1981, STATISTICAL METHODS, P68
[4]
HAYFLICK L, 1965, TEX REP BIOL MED, VS 23, P285
[10]
QUINN PA, N ENGL J MED