O.M. KOLESNIKOVA, M.E. MALKOVA First Saint Petersburg State Medical University named after Academician I.P. Pavlov, 6-8 L’va Tolstogo St., Saint-Petersburg, Russian Federation, 197022 Kolesnikova O.М. — PhD (Medicine), Senior Researcher of the Department of Otorhinolaryngology of Scientific-Research Institute for Surgery and Emergency Medicine, tel. +7-921-752-45-78, e-mail: olga_lozo@mail.ru Malkova M.Е. — intern of the Department of […]