OSPANOVA, T. S.; SEMIDOTSKAYA, Z. D.; CHERNYAKOVA, I. O.; AVDEYEVA, O. V.; PIONOVA, O. M.; TRYFONOVA, N. S. TO THE PROBLEM OF COMORBIDITY AND SYNTHROPY IN CHRONIC OBSTRUCTIVE PULMONARY DISEASE. The Journal of V. N. Karazin Kharkiv National University, series "Medicine", n. 35, p. 46-56, 29 Jun. 2018.