S.A. KARPISHCHENKO, E.V. BOLOZNEVA, E.A. GOREVA First Saint Petersburg State Medical University named after Academician I.P. Pavlov, 6-8 L’va Tolstogo St., Saint-Petersburg, 197022 Karpishchenko S.A. — DM, Professor, Head of the Otorhinolaryngology Department, tel. (812) 338-70-19, e-mail: [email protected] Bolozneva E.V. — Assistant Lecturer of the Otorhinolaryngology Department, tel. (812) 338-70-19, e-mail: [email protected] Goreva E.A. — […]