TY  - RPRT
TI  - Power determination for geographically clustered data using generalized estimating equations.
AU  - S A Hendricks
AU  - J T Wassell
AU  - J W Collins
AU  - S L Sedlak
DO  - 10.1002/(sici)1097-0258(19960930)15:18<1951::aid-sim407>3.0.co;2-p
UR  - https://pubmed.ncbi.nlm.nih.gov/8888487/
ID  - 8888487
ER  -