TY  - RPRT
TI  - The case-control method in medical care evaluation.
AU  - S Greenland
AU  - E Watson
AU  - R R Neutra
PY  - 1981
DO  - 10.1097/00005650-198108000-00006
UR  - https://pubmed.ncbi.nlm.nih.gov/7278419/
ID  - 7278419
ER  -