For citations:

Senkevich O.A., Chernobrovkina M.A., Kovalsky Yu.G. Vitamin D Supplementation of 7–8 Years Old Children from Different Geographical Areas (48–52° North Latitude): Cross Sectional Study. Current Pediatrics. 2022;21(6):487-492. https://doi.org/10.15690/vsp.v21i6.2461