TY  - RPRT
TI  - Re: "Problems due to small samples and sparse data in conditional logistic regression analysis".
AU  - B E Neuenschwander
AU  - M Zwahlen
PY  - 2000
DO  - 10.1093/aje/152.7.688
UR  - https://pubmed.ncbi.nlm.nih.gov/11032165/
ID  - 11032165
ER  -