TY  - RPRT
TI  - Comparing proportion exposed in case-control studies using several control groups.
AU  - W R Fairweather
PY  - 1987
DO  - 10.1093/aje/126.2.170
UR  - https://pubmed.ncbi.nlm.nih.gov/3605045/
ID  - 3605045
ER  -