Kolyada, T., Vdovіchenko N., Tupotіlov A., and O. Kolyada. “Characteristics of Systemic and Local Immunity in Patients With Chronic Tonsillitis”. Annals of Mechnikov’s Institute, no. 3, July 2020, pp. 45-49, https://journals.uran.ua/ami/article/view/208119.