Machaj, D., Jastrzębska, S., Cyboran, K., Płaczek, A. and Flaumenhaft, W. (2020) “The incidence of infection, diagnosis and treatment of H. pylori in developing countries on the example of Kenya”, Journal of Education, Health and Sport, 10(3), pp. 11–17. doi: 10.12775/JEHS.2020.10.03.001.