Miranda, A., Cuomo, A., Camera, S., Ciacci, C., De Filippo, F. R., Gravina, A. G., D'Onofrio, V., Melina, R., Manguso, F., Priadko, K., Facchiano, A., Bennato, R., D'Onofrio, R., Cuomo, R., Mucherino, C., & Romano, M. (n.d.). p559 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. Journal of Crohn's and colitis, 15, S522–S523. http://access.bl.uk/ark:/81055/vdc_100130764871.0x00000e