For citations:
Polivanova T.V., Kasparov E.V., Vshivkov V.A. Association of gastroesophageal reflux disease with gastritis activity in schoolchildren living in a region with a high incidence of gastric and esophageal cancer. Experimental and Clinical Gastroenterology. 2022;(6):90-96. (In Russ.) https://doi.org/10.31146/1682-8658-ecg-202-6-90-96