Covariates Influencing the Exposure‐Response Relationship for Certolizumab Pegol During the Induction and Maintenances Phases in Patients with Crohn's Disease: 572. (October 2016) - Casteele, Niels Vande; Feagan, Brian; Vermeire, Séverine; Yassine, Mohamed; Hasan, Iram; Coarse, Jason; Kosutic, Gordana; Sandborn, William J.