Tal-Shifman, N., Tzivinikos, C., Gasparetto, M., Serban, D. E., Zifman, E., Hojsak, I., Ledder, O., Yerushalmy Feler, A., Rolandsdotter, H., Aloi, M., Bramuzzo, M., Buderus, S., Lionetti, P., Norsa, L., Norden, C., Urlep, D., Romano, C., Shaoul, R., Martinez-Vinson, C., Karoliny, A., Veereman, G., Kang, B., Vlčková, E., Alvisi, P., Kori, M., Tavares, M., Weiss, B., Hussey, S., Essen Qamhawi, M., Palomino Pérez, L. M., Henderson, P., Parmar, R., Miele, E., Firas Rinawi, F., Lonzano-Ruf, A., Zamvar, V., Kolho, K. L., & Shouval, D. (n.d.). p150 Identification of features associated with poor outcomes in pediatric patients with ulcerative proctitis: A Multicentre Study From the Paediatric IBD Porto Group of ESPGHAN. Journal of Crohn's and colitis, 17, i309–i311. http://access.bl.uk/ark:/81055/vdc_100179844033.0x00001d