For citations:
Vakhrushev Ya.M., Busygina M.S., Vorobyova A.V., Farrakhov A.M. The Clinical and Functional Characteristics of Chronic Duodenal Insufficiency. The Russian Archives of Internal Medicine. 2021;11(1):43-50. https://doi.org/10.20514/2226-6704-2021-11-1-43-50