For citations:

Polivanova T.V., Vshivkov V.A. Overlap syndrome: association of gastroesophageal reflux disease with dyspepsia syndrome in schoolchildren. Rossiyskiy Vestnik Perinatologii i Pediatrii (Russian Bulletin of Perinatology and Pediatrics). 2022;67(4):54-59. (In Russ.) https://doi.org/10.21508/1027-4065-2022-67-4-54-59