For citations:
Atroshchenko A.O., Kolygin A.V., Severova M.M., Markushin L.I. Crohn’s disease manifested with massive colonic bleeding (review and a clinical case). Koloproktologia. 2021;20(3):84-94. (In Russ.) https://doi.org/10.33878/2073-7556-2021-20-3-84-94