L.L. VOLOKHOV1, E.E. ADENINSKAYA2, N.N. MAZITOVA1 1Scientific and Clinical Center of Otorhinolaryngology of the FMBA of Russia, 30/2 Volokolamskoe Highway, Moscow, Russian Federation, 123182 2Central Clinical Hospital of Civil Aviation, 7 Ivankovskoe Highway, Moscow, Russian Federation, 125367 Volokhov L.L. — Junior Researcher of the Clinical and Research Department of occupational pathology, tel. +7-916-565-75-25, e-mail: dr.leo.volokhov@gmail.com […]