Rashidi,R. , , Radjabian,T. , and Ghazanfari,T. . "Reduction of TNF-a level produced by peripheral blood leukocytes of patients with COVID-19 due to treatment with chamomile ethanolic extract", Daneshvar Medicine, 31, 4, 2023, 1-10. doi: 10.22070/daneshmed.2023.17952.1375