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

Sergeу V. Ryazantsev, Dr. Sci. (Med.), Professor, Deputy Director for Scientific and Coordination Work with the Regions

190013

9, Bronnitskaya St.

St Petersburg

E. S. Mazeinа
Saint Petersburg Research Institute of Ear, Throat, Nose and Speech
Russian Federation

Ekaterina S. Mazeinа, Clinical Resident (2 year)

190013

9, Bronnitskaya St.

St Petersburg

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

Marina A. Budkovaia, Cand. Sci. (Med.), Senior researcher

Research Department of Upper Respiratory Pathology

190013

9, Bronnitskaya St.

St Petersburg