TY  - RPRT
TI  - Interpreting time-related trends in effect estimates.
AU  - S Greenland
PY  - 1987
DO  - 10.1016/s0021-9681(87)80005-x
UR  - https://pubmed.ncbi.nlm.nih.gov/3667863/
ID  - 3667863
ER  -