N.S. KHRAPPO, E.N. STEPANOV, S.V. ARNOLDOV Samara State Medical University, 89 Chapaevskaya St., Samara, Russian Federation, 443099 Khrappo N.S. — Dr. Med. Sc., Professor of the Department of Ororhinolaryngology named after the acad. I.B. Soldatov, tel +7-927-603-25-00, e-mail: entsamara@gmail.ru Stepanov E.N. — Assistant of the Department of Ororhinolaryngology named after the acad. I.B. Soldatov, tel. […]