For citations:
Valina S.L., Shtina I.E., Ustinova O.Yu., Maklakova O.A. Trends in prevalence among children in secondary schools under the contemporary educational process and exposure to environmental factors. Health care of the Russian Federation. 2023;67(6):526-534. (In Russ.) https://doi.org/10.47470/0044-197X-2023-67-6-526-534. EDN: nqdxxm