Zhaksylyk, A. ., A. Nurbakyt, A. . Grjibovski, G. . Kaussova, and M. Buleshov. “Epidemiology of Gastrointestinal Disease Among Children and Adolescents in Kazakhstan: 2012–2019”. Open Access Macedonian Journal of Medical Sciences, vol. 9, no. E, Oct. 2021, pp. 1244-9, doi:10.3889/oamjms.2021.6931.