Narzullayev Hayotillo Fayzulla o`g`li, Gadaev A.G, Rahimova M.E, Tosharov F.Z, and Hamrayev S.R. “Assessment of Endothelial Dysfunction in Patients With Covid-19 Based on Chronic Heart Failure and Its Significance in the Effectiveness of the Treatment”. Texas Journal of Medical Science, vol. 15, Dec. 2022, pp. 208-13, doi:10.62480/tjms.2022.vol15.pp208-213.