TY  - RPRT
TI  - Methodological issues in epidemiologic studies using biologic markers.
AU  - B S Hulka
AU  - B H Margolin
PY  - 1992
DO  - 10.1093/oxfordjournals.aje.a116272
UR  - https://pubmed.ncbi.nlm.nih.gov/1536135/
ID  - 1536135
ER  -