共 31 条
- [1] ARMITAGE P, 1971, STATISTICAL METHODS, P106
- [3] BAHAR M, 1979, LANCET, V1, P527
- [4] BOAS RA, 1980, ANAESTH INTENS CARE, V8, P377
- [5] BROMAGE PR, 1980, ANESTH ANALG, V59, P473
- [7] EXTRADURAL MORPHINE FOR PAIN AFTER SURGERY [J]. BRITISH JOURNAL OF ANAESTHESIA, 1981, 53 (09) : 921 - 925
- [10] GUSTAFSSON LL, 1981, LANCET, V1, P892