A.A. NOVOZHILOV1, A.V. SHAKHOV1,2, M.N. VELICHKO1, T.E. ABUBAKIROV1, T.Ph. GAYAZOV1 1Volga District Medical Centre of the Federal Medical and Biological Agency (FMBA), 2 Nizhne-Volzhskaya naberezhnaya St., Nizhny Novgorod, Russian Federation, 603001 2Nizhny Novgorod State Medical Academy, 10/1 Minin and Pozharskiy St., Nizhny Novgorod, Russian Federation, 603950  Novozhilov A.A. — head of ENT-department, tel. +7-950-368-18-20, e-mail: […]

I.B. CHIRKOVA1, Kh.T. ABDULKERIMOV1, K.I. KARTASHOVA1, A.V. KOLESNIKOVA1, I.M. TUSHNOLOBOV2 1Ural State Medical University of the Ministry of Health of the Russian Federation, 3 Repin St., Ekaterinburg, Russian Federation, 620028 2Children City Clinical Hospital № 9, 51 Reshetskaya St., Ekaterinburg, Russian Federation, 620134 Chirkova I.B. — postgraduate student of the Department of Otorhinolaryngology, tel. +7-908-635-41-33, […]