TY  - RPRT
TI  - Methods for modelling change in cluster randomization trials.
AU  - Neil Klar
AU  - Gerarda Darlington
PY  - 2004
DO  - 10.1002/sim.1858
UR  - https://pubmed.ncbi.nlm.nih.gov/15273952/
ID  - 15273952
ER  -