TY  - RPRT
TI  - Sample size calculations for clustered binary data.
AU  - S H Jung
AU  - S H Kang
AU  - C Ahn
PY  - 2001
DO  - 10.1002/sim.846
UR  - https://pubmed.ncbi.nlm.nih.gov/11427953/
ID  - 11427953
ER  -