Asthma Is Not Associated With the Need for Surgery in Crohn's Disease When Controlling for Smoking Status: A Population‐Based Cohort Study: 2717. (October 2017) - Kuenzig, Ellen; Sadatsafavi, Mohsen; Aviña‐Zubieta, Antonio J.; Burne, Rebecca; Abrahamowicz, Michal; Beauchamp, Marie‐Eve; Kaplan, Gilaad; Benchimol, Eric