For citations:
Sherbakov A.A., Ivashova Yu.A., Shtina I.E., Ustinova O.Yu., Eisfeld D.A. The prevalence of osteopenic syndrome in students of secondary schools. Hygiene and Sanitation. 2020;99(11):1258-1262. (In Russ.) https://doi.org/10.47470/0016-9900-2020-99-11-1258-1262