Pękala, A., Aebisher, D., Pardak, P., & Filip, R. (2019). Efficacy and safety of biosimilar IFX (CT-P13) and adalimumab in patients with active fistulizing perianal Crohn’s disease naďve to anti-TNF therapy: preliminary results from the POLIBD study. European Journal of Clinical and Experimental Medicine, 17(1), 12–15. https://doi.org/10.15584/ejcem.2019.1.2