Smoking and IBD risk
A Prospective Study of Cigarette Smoking and the Risk of Inflammatory Bowel Disease in Women (Nurses’ Health Study II Cohort US)
Is Current Smoking Still an Important Environmental Factor in Inflammatory Bowel Diseases? Results from a Population-based Incident Cohort
Smoking and Inflammatory Bowel Disease: A Comparison of China, India, and the USA (Cases-Controls)
Association between inflammatory bowel disease and chronic obstructive pulmonary disease: a systematic review and meta-analysis
Association between Passive Smoking from the Mother and Pediatric Crohn’s Disease: A Japanese Multicenter Study
Risk of ulcerative colitis and Crohn’s disease in smokers lacks causal evidence (Cases-Controls- Denmark)