TY  - RPRT
TI  - Estimating causal effects from epidemiological data.
AU  - Miguel A Hernán
AU  - James M Robins
PY  - 2006
DO  - 10.1136/jech.2004.029496
UR  - https://pubmed.ncbi.nlm.nih.gov/16790829/
ID  - 16790829
ER  -