For citations:

Kharitonov D.V., Sapozhnikov V.G., Kharitonova L.A. About the constitutional features of gastric and duodenal ulcer in children. Experimental and Clinical Gastroenterology. 2022;(6):36-40. (In Russ.) https://doi.org/10.31146/1682-8658-ecg-202-6-36-40