For citations:
Provotorou V.M., Chesnokov P.E., Pritzepov Yu.L., Semenkova G.G., Kuznetzov S.I., Zimemskaya E.V. The clinical evaluation of cough efficacy by means of expectoration time and tussography method in patients with nonspecific diseases of the lungs. PULMONOLOGIYA. 1992;(2):49-51. (In Russ.)
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