TY  - RPRT
TI  - Are active and passive smoking harmful? Determining causation.
AU  - G H Guyatt
AU  - M T Newhouse
PY  - 1985
DO  - 10.1378/chest.88.3.445
UR  - https://pubmed.ncbi.nlm.nih.gov/4028856/
ID  - 4028856
ER  -