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APA Citation
Carpio, D., Calviño-Suarez, C., Martínez-Cadilla, J., Molina, G., Vázquez-Rey, M. T., Martí, E., Fernández-Salgado, E., Barreiro-de Acosta, M., Hernández, V., Echarri, A., Diz-Lois, M. T., & Baz, A. (n.d.). p412 Effectiveness of ustekinumab in fistulising perianal Crohn′s disease refractory or intolerant to anti-TNF. Journal of Crohn's and colitis, 15, S419–S420. http://access.bl.uk/ark:/81055/vdc_100130765214.0x000015