共 50 条
- [8] REPLICATION OF MULTICENTER CLINICAL-TRIALS FOR EFFICACY JOURNAL OF CHRONIC DISEASES, 1985, 38 (03): : 265 - 269
- [9] MULTICENTER VERSUS UNICENTER CLINICAL-TRIALS REVISTA DE INVESTIGACION CLINICA-CLINICAL AND TRANSLATIONAL INVESTIGATION, 1990, 42 : 39 - 42