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

Sergey V. Ryazantsev, Dr. Sci. (Med.), Professor, Deputy Director

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

G. P. Zakharova
Saint Petersburg Research Institute of Ear, Throat, Nose and Speech
Russian Federation

Galina P. Zakharova, Dr. Sci. (Med.), Leading Researcher, Research Department of Upper Respiratory Pathology

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

N. I. Ivanov
Saint Petersburg Research Institute of Ear, Throat, Nose and Speech
Russian Federation

Nikita I. Ivanov, Postgraduate Student of the Research Department of Pathology of the Upper Respiratory Tracts

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