A. A. Krivopalov
Saint Petersburg Research Institute of Ear, Throat, Nose and Speech; North-Western State Medical University named after I.I. Mechnikov
Russian Federation

Aleksandr А. Krivopalov, Dr. Sci. (Med.), Head of the Research Department of Upper Respiratory Pathology, Saint Petersburg Research Institute of Ear, Throat, Nose and Speech; Associate Professor of the Department of Otorhinolaryngology, North-Western State Medical University named after I.I. Mechnikov

9, Bronnitskaya St., St Petersburg, 190013,

41, Kirochnaya St., St Petersburg, 191015

A. I. Kryukov
Sverzhevsky Scientific Research Clinical Institute of Otorhinolaryngology; Pirogov Russian National Research Medical University
Russian Federation

Andrey I. Kryukov, Dr. Sci. (Med.), Professor, Chief Outside Specialist-Otorhinolaryngologist of the Moscow City Health Department, Director, Sverzhevsky Scientific Research Clinical Institute of Otorhinolaryngology; Head of the Department of Otolaryngology, Faculty of Advanced Medical Studies, Pirogov Russian National Research Medical University

18a, Bldg. 2, Zagorodnoe Shosse, Moscow, 117152,

1, Ostrovityanov St., Moscow, 117997

M. A. Lengina
South Ural State Medical University
Russian Federation

Maria A. Lengina, Cand. Sci. (Med.), Associate Professor of the Department of Otorhinolaryngology

64, Vorovskiy St., Chelyabinsk, 454092

А. M. Korkmazov
South Ural State Medical University
Russian Federation

Arsen M. Korkmazov, Cand. Sci. (Med.), Associate Professor of the Department of Otorhinolaryngology

64, Vorovskiy St., Chelyabinsk, 454092

N. V. Kornova
South Ural State Medical University
Russian Federation

Natalia V. Kornova, Cand. Sci. (Med.), Associate Professor of the Department of Otorhinolaryngology

64, Vorovskiy St., Chelyabinsk, 454092