M.A. RYABOVA, N.А. SHUMILOVA, L.V. PESTAKOVA, Е.К. TIKHOMIROVA Pavlov First Saint Petersburg State Medical University, 6-8 Leo Tolstoy Str., Saint Petersburg, Russian Federation, 197022  Ryabova M.A. — Doc. Med. Sc., Professor of the Otorhinolaryngology Department, tel. (812) 338-71-76, e-mail: marinaryabova@mail.ru Shumilova N.A. — Cand. Med. Sc., Assistant Lecturer of the Otorhinolaryngology Department, Researcher at the […]