For citations:
Trapeznikova A.Yu., Permyakova A.A., Vasilyeva A.G., Korostovtseva E.Yu., Ivanov G.V. Features of upper gastrointestinal involvement during the onset of Crohn’s disease. Filin’s Clinical endoscopy. 2026;68(2):36-39. (In Russ.) https://doi.org/10.31146/2415-7813-endo-68-2-36-39
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