共 19 条
[4]
DOHERTY GM, 1991, SURGERY, V110, P192
[7]
Comparison of evidence of treatment effects in randomized and nonrandomized studies
[J].
JAMA-JOURNAL OF THE AMERICAN MEDICAL ASSOCIATION,
2001, 286 (07)
:821-830
[9]
MADDREY WC, 1978, GASTROENTEROLOGY, V75, P193

