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

Petr V. Nacharov, Cand. Sci. (Med.), Associate Professor, Head of the Research Department of Laboratory and Diagnostic

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

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

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

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

T. I. Shustova
Saint Petersburg Research Institute of Ear, Throat, Nose and Speech
Russian Federation

Tatiana I. Shustova, Dr. Sci. (Biol.), Professor, Chief Researcher 

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