1. Faculty of Medicine and Health Sciences, University of Antwerp, Antwerp, Belgium
2. Medical School, Hochschule Fresenius University of Applied Sciences, Hamburg, Germany
3. Faculty of Health Care, HU University of Applied Sciences Utrecht, Utrecht, the Netherlands
4. Independent speech–language therapist, the Netherlands
5. Julius Center for Health Science and Primary Care, University Medical Center Utrecht, Utrecht, the Netherlands
6. European Institute for ORL, Sint-Augustinus Hospital, Antwerp, Antwerp, Belgium
7. Faculty of Education, Health & Social Work, University College Ghent, Ghent, Belgium