Sorokman, T.; Chernei, N.; Sokolnyk, S.; Sokolnyk, I.; Popelyuk, N. The Influence of Helicobacter Pylori on the Level of Endotheline-1 and Nitrogen Oxide in the Blood of Children With the Duodenal Ulcer. J Educ Health Sport 2020, 10, 261-272.