TY  - RPRT
TI  - Validity in estimating relative risk in case-control studies.
AU  - D G Seigel
AU  - S W Greenhouse
PY  - 1973
DO  - 10.1016/0021-9681(73)90102-1
UR  - https://pubmed.ncbi.nlm.nih.gov/4714570/
ID  - 4714570
ER  -