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 A. Krivopalov, Dr. Sci. (Med.), Head of the Research Department of Pathology of the Upper Respiratory Tract; Associate Professor, Department of Otorhinolaryngology

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

41, Kirochnaya St., St Petersburg, 191015, 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 Science 

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

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

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

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

A. I. Glyshchenko
Saint Petersburg Research Institute of Ear, Throat, Nose and Speech
Russian Federation

Alexandra I. Glyshchenko, Postgraduate Student, Research Department of Pathology of the Upper Respiratory Tract 

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