SHYSHKIN, M. A. and KHRYSTENKO, T. O. Comparative study of KI-67 and CD44 expression in serrated polyps of the distal colon. Journal of Education, Health and Sport. Online. 31 July 2020. Vol. 10, no. 7, pp. 358-365. [Accessed 23 July 2024]. DOI 10.12775/JEHS.2020.10.07.038.