Efficacy and Safety of Dose Adjustment and Delayed Response to Ustekinumab in Moderate ‐ Severe Crohn's Disease Patients: Results from the IM‐UNITI Maintenance Study: 2016 ACG Presidential Poster Award: 663. (October 2016) - Sands, Bruce; Gasink, Chris; Jacobstein, Doug; Gao, Long Long; Johanns, Jewel; Szapary, Philippe; Colombel, Jean‐Frederic; Targan, Stephan; Ghosh, Subrata; Sandborn, William J.