共 28 条
- [1] BURKHARDT R, 1978, LANCET, V2, P1356
- [3] CAMPBELL DT, 1963, EXPT QUASIEXPERIMENT, P10
- [7] STANDARDS FOR PUBLICATION OF THERAPEUTIC RESEARCH [J]. JOURNAL OF CHRONIC DISEASES, 1980, 33 (02): : 65 - 66
- [9] RANDOMIZATION OF HUMAN SUBJECTS [J]. NEW ENGLAND JOURNAL OF MEDICINE, 1974, 291 (24) : 1305 - 1306