TY  - RPRT
TI  - The case-referent study--some comments on its structure, merits and limitations.
AU  - O Axelson
PY  - 1985
DO  - 10.5271/sjweh.2233
UR  - https://pubmed.ncbi.nlm.nih.gov/4035323/
ID  - 4035323
ER  -