共 26 条
[14]
JONELL G, 1978, AM J SURG, V135, P630
[15]
KEIGHLEY MRB, 1979, LANCET, V1, P894
[16]
KELLER JW, 1966, CANCER, V19, P549, DOI 10.1002/1097-0142(196604)19:4<549::AID-CNCR2820190413>3.0.CO
[17]
2-4
[18]
LETWEN ER, 1975, CAN J SURG, V18, P31
[20]
NIE N, 1970, SPSS STATISTICAL PAC