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 of Saint Petersburg Research Institute of Ear, Throat, Nose and Speech; Associate Professor of the Department of ORL Diseases of the North-Western State Medical University named after I.I. Mechnikov

9, Bronnitskaya St., St Petersburg, 190013, 

41, Kirochnaya St., St Petersburg, 191015

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

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

64, Vorovskiy St., Chelyabinsk, 454092

I. D. Dubinets
South Ural State Medical University
Russian Federation

Irina D. Dubinets, Cand. Sci. (Med.), Associate Professor, Associate Professor Department of Otorhinolaryngology

64, Vorovskiy St., Chelyabinsk, 454092

E. M. Lapushkin
Saint Petersburg Research Institute of Ear, Throat, Nose and Speech
Russian Federation

Evgenii M. Lapushkin, Otorhinolaryngologist, Postgraduate Student

9, Bronnitskaya St., St Petersburg, 190013