For citations:
Furman E.G., Kondrat'eva E.I., Chernyak A.V., Shadrina V.V. The age-related assessment of pulmonary function in children with cystic fibrosis aged below 6 years. PULMONOLOGIYA. 2019;29(6):739-744. (In Russ.) https://doi.org/10.18093/0869-0189-2019-29-6-739-744