TY  - RPRT
TI  - Analysis of prevention program effectiveness with clustered data using generalized estimating equations.
AU  - E C Norton
AU  - G S Bieler
AU  - S T Ennett
AU  - G A Zarkin
PY  - 1996
DO  - 10.1037//0022-006x.64.5.919
UR  - https://pubmed.ncbi.nlm.nih.gov/8916620/
ID  - 8916620
ER  -