共 10 条
[6]
HILL J R, 1960, Dis Colon Rectum, V3, P203, DOI 10.1007/BF02616555
[8]
PORTER N H, 1961, Proc R Soc Med, V54, P1043
[10]
SHELLEY T, 1965, J OBSTET GYN BR COMM, V72, P926