TY  - RPRT
TI  - Assessing changes in risk factor effect over multiple levels of severity.
AU  - C J MacLean
PY  - 1988
DO  - 10.1093/oxfordjournals.aje.a114841
UR  - https://pubmed.ncbi.nlm.nih.gov/3124606/
ID  - 3124606
ER  -