TY  - GEN
AU  - VanderWeele,Tyler J
AU  - Hernán,Miguel A
AU  - Robins,James M
TI  - Causal directed acyclic graphs and the direction of unmeasured confounding bias
SN  - 1531-5487
PY  - 2008///0902
KW  - Bias
KW  - Causality
KW  - Confounding Factors, Epidemiologic
KW  - Humans
KW  - Models, Statistical
N1  - Publication Type: Journal Article
UR  - https://doi.org/10.1097/EDE.0b013e3181810e29
ER  -