TY  - RPRT
TI  - A nested approach to evaluating dose-response and trend.
AU  - J S Witte
AU  - S Greenland
PY  - 1997
DO  - 10.1016/s1047-2797(96)00159-7
UR  - https://pubmed.ncbi.nlm.nih.gov/9141641/
ID  - 9141641
ER  -