[1] Inst Physiol & Pathol Hearing, PL-02042 Warsaw, Poland
[2] World Hearing Ctr, Nadarzyn, Poland
[3] Univ Antwerp Hosp, Antwerp, Belgium
[4] London Hlth Sci Ctr, London, ON, Canada
[5] Inst ORL, Buenos Aires, DF, Argentina
[6] Lions Hearing Clin, Ear Sci Inst Australia, Subiaco, WA, Australia
[7] Med Univ Wien, Univ Klin Hals Nasen & Ohrenkrankheiten, Vienna, Austria
[8] Inselspital Bern, Univ Klin HNO Kopf & Halschirurg, CH-3010 Bern, Switzerland
[9] Hosp La Paz, Madrid, Spain
[10] Ctr Hosp Univ Rennes, Rennes, France
[11] Cent Manchester Univ Hosp, Manchester Auditory Implant Ctr, Manchester, Lancs, England
[12] Univ Wurzburg, Comprehens Hearing Ctr, Dept Otorhinolaryngol, Wurzburg, Germany
[13] Capital Med Univ, Beijing Tongren Hosp, Beijing, Peoples R China
[14] MERF, Chennai, Tamil Nadu, India
[15] Karolinska Univ Hosp, Stockholm, Sweden
[16] St Petersburg ENT & Speech Res Inst, St Petersburg, Russia
[17] ENT Super Special Inst & Res Ctr, Kolkata, India
[18] Bradford Royal Infirm, Bradford BD9 6RJ, W Yorkshire, England
[19] Klinikum Univ Munchen, Klin & Poliklin Hals Nasen Ohrenheilkunde, Munich, Germany
[20] Univ Kansas, Ctr Hearing & Balance Disorders, Kansas City, KS USA
[21] Univ Western Australia, Fremantle Hosp, Sch Surg, Otolaryngol Head & Neck Surg Unit, Fremantle, WA, Australia
[22] Ctr Med Otol, Clin Rivas, Bogota, Colombia
[23] Inst Sensory Organs, Nadarzyn, Poland
[24] Univ Klin Hals Nasen Ohrenheilkunde Innsbruck, Innsbruck, Austria
[25] Shinshu Univ, Sch Med, Matsumoto, Nagano 390, Japan
[26] Sanatorio Allende, Serv Otorinolaringol, Cordoba, Argentina