1. ENT & Audiology Unit, Department of Neurosciences, University Hospital of Ferrara, 44121 Ferrara, Italy
2. Department of Otorhinolaryngology, Careggi University Hospital, 50134 Florence, Italy
3. Department of Otorhinolaryngology, University Hospital of Modena, 41125 Modena, Italy
4. Institute of Sensory Organs, 1 Mokra Street, 05-830 Kajetany, Poland
5. Institute of Physiology and Pathology of Hearing, 10 Mochnackiego Street, 02-042 Warsaw, Poland
6. Department of Heart Failure and Cardiac Rehabilitation, Medical University of Warsaw, 8 Kondratowicza Street, 03-242 Warsaw, Poland