TY  - RPRT
TI  - Analysis of repeated categorical data using generalized estimating equations.
AU  - S R Lipsitz
AU  - K Kim
AU  - L Zhao
PY  - 1994
DO  - 10.1002/sim.4780131106
UR  - https://pubmed.ncbi.nlm.nih.gov/8091041/
ID  - 8091041
ER  -