RT Conference Proceedings T1 Ustekinumab is an effective and safe therapy in anti-TNF refractory Crohn's Disease: a two year real-life observational study from Spain A1 Rueda Sanchez, J. A1 Cabello Ramirez, N. A1 Camara Baena, S. A1 Keco Huerga, A. A1 de la Borbolla Serres, J. Garcia A1 Castro Fernandez, M. A1 Grande Santamaria, L. PB Oxford univ press SN 1873-9946 YR 2021 FD 2021-05-01 LK https://hdl.handle.net/10668/27120 UL https://hdl.handle.net/10668/27120 LA en DS RISalud RD Apr 9, 2025