TY  - RPRT
TI  - Cigarettes, ulcerative colitis, and inferences from uncontrolled data.
AU  - J C Bailar
PY  - 1983
DO  - 10.1056/nejm198302033080511
UR  - https://pubmed.ncbi.nlm.nih.gov/6848941/
ID  - 6848941
ER  -