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.), Associate Professor, Head of the Department of Pathology of the Upper Respiratory Tract, Saint Petersburg RI of Ear, Throat, Nose and Speech; Associate Professor of the Department of Otorhinolaryngology, North-Western SMU named after I.I. Mechnikov;

9, Bronnitskaya St., St Petersburg, 190013; 41, Kirochnaya St., St Petersburg, 191015

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 Work.

9, Bronnitskaya St., St Petersburg, 190013

V. I. Popadyuk
Peoples’ Friendship University of Russia named after Patrice Lumumba
Russian Federation

Valentin I. Popadyuk - Dr. Sci. (Med.), Professor, Dean of the Faculty of Continuing Medical Education, Head of the Department of Otorhinolaryngology of the Medical Institute.

6, Miklukho-Maklai St., Moscow, 117198

A. M. Korkmazov
South Ural State Medical University
Russian Federation

Arsen M. Korkmazov - Cand. Sci. (Med.), Associate Professor of the Department of Otorhinolaryngology.

454092, Russia, Chelyabinsk, Vorovskiy St., 64

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

Anzhela A. Aslambekova - Clinical Resident.

9, Bronnitskaya St., St Petersburg, 190013