1Department of Phoniatrics and Paedaudiology, University of Greifswald, Greifswald, Germany
2Department of Otolaryngology-Head and Neck Surgery, VU University Medical Center, Amsterdam, The Netherlands
3Department of Otolaryngology and Communication Disorders, University of Antwerp, Edegem, Belgium
4Speech Therapy Department, Escola Superior de Saude do Alcoitao, Lisbon, Portugal
5Karolinska Institute, Department of Logopedics and Phoniatrics, Karolinska University Hospital, Huddinge, Sweden
6Department of Otolaryngology-Head and Neck Surgery, University of Pittsburgh Voice Center, Pittsburgh, Pa., USA
7Department of Clinical Sciences ‘L. Sacco’, University of Milan, Milan, Italy
8Department of Otorhinolaryngology, Head and Neck Surgery, Larrey University Hospital of Toulouse, Toulouse, France
9Department of Neuro-otology, National Hospital for Neurology and Neurosurgery, London, UK
10Department of Community Medicine, University of Greifswald, Greifswald, Germany
