For citations:

Shashel V.A., Pervishko O.V., Matalaeva S.Yu., Ivanenko A.S., Firsova V.N. Microelement imbalance in children as a marker of environmental unfavorability and the development of digestive system diseases in children. Experimental and Clinical Gastroenterology. 2026;(1):69-77. (In Russ.) https://doi.org/10.31146/1682-8658-ecg-245-1-69-77