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 Coordination Work

9, Bronnitskaya St., St Petersburg, 190013

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

Marina A. Budkovaia, Cand. Sci. (Med.), Senior Research Associate of the Department of Upper Respiratory Tract Pathology, ENT Surgeon

9, Bronnitskaya St., St Petersburg, 190013

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

Svetlana A. Rebrova, Cand. Sci. (Med.), Senior Research Associate of the Department of Upper Respiratory Tract Pathology, Allergist-Immunologist

9, Bronnitskaya St., St Petersburg, 190013