TY  - RPRT
TI  - Problems due to small samples and sparse data in conditional logistic regression analysis.
AU  - S Greenland
AU  - J A Schwartzbaum
AU  - W D Finkle
PY  - 2000
DO  - 10.1093/oxfordjournals.aje.a010240
UR  - https://pubmed.ncbi.nlm.nih.gov/10707923/
ID  - 10707923
ER  -