M. V. Drozdova
Saint Petersburg Research Institute of Ear, Throat, Nose and Speech
Russian Federation

 Dr. Sci. (Med.), Leading Researcher of the Department for the Development and Implementation of High-Tech Treatment Methods, Head of the Department of Reconstructive Surgery

9, Bronnitskaya St., St Petersburg, 190013, Russia 

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

Cand. Sci. (Med.), Researcher of the Department of Diagnostics and Treatment of Hearing Disorders 

9, Bronnitskaya St., St Petersburg, 190013, Russia 

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

 Dr. Sci. (Med.), Professor, Deputy Director for Scientific and Coordination Work with the Regions 

9, Bronnitskaya St., St Petersburg, 190013, Russia 

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

 Junior Researcher of the Organizational and Methodical Department 

9, Bronnitskaya St., St Petersburg, 190013, Russia