[1] Bashkir State Med Univ, Dept Neurol, Ufa, Russia
[2] Tampere Univ, Fac Med & Hlth Technol, Sch Med, Hearing & Balance Res Unit,Field Otolaryngol, Tampere, Finland
[3] Univ Sydney, Brain & Mind Ctr, Sydney, NSW, Australia
[4] Klinikum Bielefeld, Dept Otorhinolaryngol Head & Neck Surg, Bielefeld, Germany