1. Department of Otorhinolaryngology; Radboud University Medical Center; Nijmegen The Netherlands
2. Department of Otorhinolaryngology; Queen Elizabeth Hospital; Birmingham UK
3. Institute of Physiology and Pathology of Hearing; World Hearing Center; Warsaw Poland
4. Department of the Heart Failure and Cardiac Rehabilitation of Medical; University of Warsaw; Warsaw Poland
5. Institute of Sensory Organs; Kajetany Poland
6. Department of Otorhinolaryngology; Manchester Royal Infirmary; Manchester UK
7. Department of Otorhinolaryngology; Medical College of Wisconsin; Milwaukee Wisconsin
8. Cochlear Bone Anchored Solutions AB; Molnlycke Sweden