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

Sergei A. Eremin, Cand. Sci. (Med.), Researcher, Department of Pathology of the Outer, Middle and Inner Ear

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

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

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

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

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

Sergey I. Sitnikov, Resident of the Second Year of Study 

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

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

Svetlana S. Vysockaya, Deputy Head of the Department for Organization of Scientific Work, Otorhinolaryngologist 

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