TY  - RPRT
TI  - A computer program for regression analysis of repeated measures using generalized estimating equations.
AU  - C S Davis
PY  - 1993
DO  - 10.1016/0169-2607(93)90046-n
UR  - https://pubmed.ncbi.nlm.nih.gov/8403864/
ID  - 8403864
ER  -