Shulhai, A-M. A., and H. A. Pavlyshyn. “PREVALENCE AND RISK FACTORS FOR VITAMIN D DEFICIENCY IN OVERWEIGHT AND OBESE ADOLESCENTS IN UKRAINE”. International Journal of Medicine and Medical Research, vol. 4, no. 2, Mar. 2019, pp. 24-30, doi:10.11603/ijmmr.2413-6077.2018.2.9694.