Nikolaychuk , M.A., L.R. Shostakovych-Koretskaya, I.V. Budayeva, and S.V. Biletska. 2021. “Influence of Seasonality on Vitamin D Level in Patients With HCV Infection and Healthy People”. Medicni Perspektivi 26 (1):184-90. https://doi.org/10.26641/2307-0404.2021.1.228000.