S.A. KARPISCHENKO, A.A. ZUBAREVA, S.V. BARANSKAYA, A.A. KARPOV Pavlov First Saint Petersburg State Medical University, 6-8 Leo Tolstoy Str., Saint Petersburg, Russian Federation, 197022  Karpischenko S.A. – D. Med. Sc., Professor, Head of the ENT Department, tel. (812) 338-70-19, e-mail: karpischenkos@mail.ru Zubareva A.A. – D. Med. Sc., Professor, Head of the ENT Department, tel. (812) […]