For citations:
Kruglyakov S.V., Gordienko V.P., Lysenko O.V., Mazharova O.A., Poberezhskiy A.V., Kruglyakova L.V., Kutilov Yu.V. Once again about difficulties of early diagnosis of Pancoast tumor (case studies). Bulletin Physiology and Pathology of Respiration. 2019;(73):69-75. (In Russ.) https://doi.org/10.36604/1998-5029-2019-73-69-75