S. V. Ryazantsev
Saint Petersburg Research Institute of Ear, Throat, Nose and Speech
Russian Federation

Sergei V. Ryazantsev, Dr. Sci. (Med.), Professor, Deputy Director for Scientific Work

9, Bronnitskaya St., St Petersburg, 190013

S. S. Vysockaya
Saint Petersburg Research Institute of Ear, Throat, Nose and Speech
Russian Federation

Svetlana S. Vysockaya, Otorhinolaryngologist, Deputy Head of the Department

9, Bronnitskaya St., St Petersburg, 190013

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

Ivan V. Fanta, Cand. Sci. (Med.), Head of the Organizational and Methodological Department

9, Bronnitskaya St., St Petersburg, 190013

Yu. S. Aleksanian
Saint Petersburg Research Institute of Ear, Throat, Nose and Speech
Russian Federation

Yuri S. Aleksanian, Otorhinolaryngologist, Junior Researcher at the Research Department for Pathology of the Upper Respiratory Tract

9, Bronnitskaya St., St Petersburg, 190013