1. Ivashkin V.T., Shelygin Yu.A., Khalif I.L., Belousova E.A., Shifrin O.S., Abdulganieva D.I. et al. Clinical guide of Russian association of gastroenterology and Russian association of coloproctology on diagnostics and treatment of Crohn's disease. 2017. (In Russ.) Available at: https://www.mrckb.ru/files/R_Krona_2017(1).pdf.
2. Ivashkin V.T., Shelygin Yu.A., Khalif I.L., Belousova E.A., Shifrin O.S., Abdulganieva D.I. et al. Clinical guide of Russian association of gastroenterology and Russian association of coloproctology on diagnostics and treatment of ulcerative colitis. Koloproktologiya = Coloproctology. 2017;(1):6-30. (In Russ.) Available at: https://www.ruproctology.com/jour/article/view/291/291#.
3. Klapproth J.-M.A. Inflammatory Bowel Disease. In: Srinivasan S., Friedman L.S., Anania F.A. (eds.) Sitaraman and Friedman's Essentials of Gastroenterology. Second Edition. 2017, pp. 113-131. Available at: https://onlinelibrary.wiley.com/doi/abs/10.1002/9781119235170.ch8.
4. Maev I.V., Andreev D.N. Targeted therapy of inflammatory bowel diseases: realities and prospects. Meditsinskiy sovet = Medical Council. 2018;(6):114-118. (In Russ.) doi: 10.21518/2079-701X-2018-6-114-118.
5. Truelove S.C., Witts L.J. Cortisone in ulcerative colitis. Final report on a therapeutic trial. Br Med J. 1955;2:1041-1048. doi: 10.1136/bmj.2.4947.1041.