共 21 条
[1]
[Anonymous], J MED INTERNET RES
[3]
Bessell Tracey L, 2002, Health Expect, V5, P28, DOI 10.1046/j.1369-6513.2002.00156.x
[6]
CONSORT statement: extension to cluster randomised trials
[J].
BMJ-BRITISH MEDICAL JOURNAL,
2004, 328 (7441)
:702-708