For citations:

Fedotov V.D., Shoniya M.L., Belousko N.I. Clinical and prognostic aspects of the relationship of chronic obstructive pulmonary disease of occupational etiology and chronic non-obstructive bronchitis. Russian Journal of Occupational Health and Industrial Ecology. 2020;(1):53-58. (In Russ.) https://doi.org/10.31089/1026-9428-2020-60-1-53-58