S721 Treatment Persistence Among Bio-naïve Patients with Crohn's Disease Initiated on Ustekinumab and Adalimumab. (October 2021) - Pilon, Dominic; Ding, Zhijie; Manceur, Ameur M.; Muser, Erik; Zhdanava, Maryia; Kinkead, Frederic; Lafeuille, Marie-Hélène; Lefebvre, Patrick