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

Kseniya A. Balatskaya, Researcher

9, Bronnitskaya St., St Petersburg, 190013

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

Vladimir V. Dvoryanchikov, Dr. Sci. (Med.), Professor, Director

9, Bronnitskaya St., St Petersburg, 190013

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

Yu. K. Yanov
Military Medical Academy named after S.M. Kirov
Russian Federation

Yuri K. Yanov, Dr. Sci. (Med.), Professor, Аcademican of the Russian Academy of Sciences, Department of Otorhinolaryngology 

6, Akademik Lebedev St., St Petersburg, 194044

I. V. Tkachuk
Military Medical Academy named after S.M. Kirov
Russian Federation

Irina V. Tkachuk, Cand. Sci. (Med.), Associate Professor of the Department of Otorhinolaryngology 

6, Akademik Lebedev St., St Petersburg, 194044

S. A. Artyushkin
North-Western State Medical University named after I.I. Mechnikov
Russian Federation

Sergei A. Artyushkin, Dr. Sci. (Med.), Professor, Head of the Chair of Otorhinolaryngology

41, Kirochnaya St., St Petersburg, 191015