TY  - RPRT
TI  - Confounded confounding.
AU  - W Winkelstein
AU  - L I Levin
PY  - 1981
DO  - 10.1093/oxfordjournals.aje.a113072
UR  - https://pubmed.ncbi.nlm.nih.gov/7457483/
ID  - 7457483
ER  -