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

Sergey V. Ryazantsev - Dr. Sci. (Med.), Professor, Deputy Director for Scientific Work, Saint Petersburg Research Institute of Ear, Throat, Nose and Speech; Professor of the Department of ENT Diseases, North-Western State Medical University named after I.I. Mechnikov.

9, Bronnitskaya St., St Petersburg, 190013; 41, Kirochnaya St., St Petersburg, 191015

K. A. Balatskaya
Saint Petersburg Research Institute of Ear, Throat, Nose and Speech
Russian Federation

Kseniya A. Balatskaya - Head of the Educational and Methodological Department, Otolaryngologist, Saint Petersburg Research Institute of Ear, Throat, Nose and Speech.

9, Bronnitskaya St., St Petersburg, 190013

I. V. Tkachuk
Saint Petersburg Research Institute of Ear, Throat, Nose and Speech
Russian Federation

Irina V. Tkachuk - Cand. Sci. (Med.), Senior Researcher, Department of Upper Respiratory Tract Pathology, Saint Petersburg Research Institute of Ear, Throat, Nose and Speech.

9, Bronnitskaya St., St Petersburg, 190013

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

Natalia V. Kornova - Cand. Sci. (Med.), Associate Professor Department of Otorhinolaryngology, South Ural State Medical University.

64, Vorovskiy St., Chelyabinsk, 454092

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

Arsen M. Korkmazov - Cand. Sci. (Med.), Associate Professor Department of Otorhinolaryngology, South Ural State Medical University.

64, Vorovskiy St., Chelyabinsk, 454092