For citations:
Mokronosova M.A., Konishcheva A.Yu., Mazurina S.A., Zheltikova T.M. Age-related differences in the fractional exhaled nitric oxide concentration in patients with asthma. PULMONOLOGIYA. 2025;35(4):491-499. (In Russ.) https://doi.org/10.18093/0869-0189-2025-35-4-491-499