共 5 条
- [1] CONSORT statement: extension to cluster randomised trials [J]. BMJ-BRITISH MEDICAL JOURNAL, 2004, 328 (7441): : 702 - 708
- [2] Cluster randomised trials: time for improvement - The implications of adopting a cluster design are still largely being ignored [J]. BMJ-BRITISH MEDICAL JOURNAL, 1998, 317 (7167): : 1171 - 1172
- [4] Ukoumunne O. C., 1999, HLTH TECHNOL ASSESS, V3