TY  - RPRT
TI  - Comparative, observational designs: case-control and cohort studies.
AU  - J D Whitney
PY  - 2000
DO  - 10.1016/s1071-5754(00)90058-5
UR  - https://pubmed.ncbi.nlm.nih.gov/10814953/
ID  - 10814953
ER  -