S.A. KARPISHCHENKO, S.V. BARANSKAYA First Saint Petersburg State Medical University named after Academician I.P. Pavlov, 6-8 Lev Tolstoy Str., Saint Petersburg, Russian Federation, 197022 Karpishchenko S.A. — DM, Professor, Head of the Otolaryngology Department, tel. (843) 499-70-19, e-mail: [email protected] Baranskaya S.V. — clinical resident doctor of the Department of Otolaryngology with clinics, tel. (812) 499-71-76, […]