TY  - RPRT
TI  - Cluster-randomized trials.
AU  - P M Fayers
AU  - M S Jordhøy
AU  - S Kaasa
PY  - 2002
DO  - 10.1191/0269216302pm503xx
UR  - https://pubmed.ncbi.nlm.nih.gov/11963457/
ID  - 11963457
ER  -