V. B. Pankova
Th e All-Russian Scientifi c Research Institute of Railway Hygiene; Russian scientifi c and clinical center of audiology and hearing aid; Clinical Centre of Otorhinolaryngology
Russian Federation

For correspondence: Vera B. Pankova, Head of Department of clinical research and occupational pathology, Prof., Dr. of Sci. (Med.)

1, Pakgauznoe highway, Moscow, Russia, 125438

123, Leninskу Ave., Moscow, Russia, 117513

30/2, Volokolamskoye highway, Moscow, Russia, 123182

G. A. Tavartkiladze
Russian scientifi c and clinical center of audiology and hearing aid
Russian Federation

123, Leninskу Ave., Moscow, Russia, 117513

N. A. Daykhes
Clinical Centre of Otorhinolaryngology
Russian Federation

30/2, Volokolamskoye highway, Moscow, Russia, 123182

I. N. Fedina
Clinical Centre of Otorhinolaryngology; Federal Scientifi c Center of Hygiene named aft er F.F. Erisman
Russian Federation

30/2, Volokolamskoye highway, Moscow, Russia, 123182

2, Semashko str., Mytischi town, Russia, 141014