For citations:

Chyzhevskaya I.D., Belyaeva L.M. The state of the digestive system in children with systemic connective tissue diseases. Rossiyskiy Vestnik Perinatologii i Pediatrii (Russian Bulletin of Perinatology and Pediatrics). 2020;65(1):65-70. (In Russ.) https://doi.org/10.21508/1027-4065-2020-65-1-65-70