AF.54 EFFICACY OF USTEKINUMAB IN THE TREATMENT OF PATIENTS WITH CROHN'S DISEASE WITH FAILURE TO PREVIOUS CONVENTIONAL OR BIOLOGIC THERAPY: AN OBSERVATIONAL REAL-LIFE STUDY. (September 2021) - Miranda, A.; Cuomo, A.; Camera, S.; Gravina, A.G.; Ciacci, C.; De Filippo, F.R.; D'Onofrio, V.; Melina, R.; Granata, L.; Facchiano, A.; Priadko, K.; Manguso, F.; et al.