For citations:
Goncharenko O.V., Budnevskiy A.V., Kozhevnikova S.A., Ovsyannikov E.S. Clinical significance of melatonin level in patients with chronic obstructive pulmonary disease. PULMONOLOGIYA. 2019;29(1):7-17. (In Russ.) https://doi.org/10.18093/0869-0189-2019-29-1-7-7-17