For citations:
Polivanova T.V., Ahmetshin T.N., Selyutina G.V., Vshivkov V.A. Changes in the activity of Helicobacter pylori-associated gastritis in schoolchildren with gastroesophageal reflux disease. Russian Pediatric Journal. 2025;28(3):176-180. (In Russ.) https://doi.org/10.46563/1560-9561-2025-28-3-176-180