TY  - RPRT
TI  - Sample size re-estimation in cluster randomization trials.
AU  - Stephen Lake
AU  - Erin Kammann
AU  - Neil Klar
AU  - Rebecca Betensky
PY  - 2002
DO  - 10.1002/sim.1121
UR  - https://pubmed.ncbi.nlm.nih.gov/12185888/
ID  - 12185888
ER  -