For citations:
Belmer S.V., Volynets G.V., Gorelov A.V., Gurova M.M., Zvyagin A.A., Kornienko E.A., Novikova V.P., Pechkurov D.V., Privorotskiy V.F., Tyazheva A.A., Faizullina R.A., Khavkin A.I., Erdes S.I. Functional Disorders of Digestive System in Children. Guidelines of Society of Pediatric Gastroenterology, Hepatology and Nutrition. Part 3. Rossiyskiy Vestnik Perinatologii i Pediatrii (Russian Bulletin of Perinatology and Pediatrics). 2020;65(6):133-144. (In Russ.) https://doi.org/10.21508/1027-4065-2020-65-6-133-144