Michalak, A., Kasztelan-Szczerbinska, B., Laskowska, K., Radwan, P., Cybulski, M., & Cichoż-Lach, H. (2020). Efficacy of biological treatment in inflammatory bowel disease – a single-center experience. Polish Journal of Public Health, 129(3), 105-109. https://doi.org/10.2478/pjph-2019-0024