1. MED-EL GmbH, Fuerstenweg 77a, 6020 Innsbruck, Austria
2. Antwerp University Hospital – University of Antwerp, Edegem, Antwerp, Belgium
3. Faculty of Medicine and Health Sciences, University of Antwerp, Antwerp, Belgium
4. Department of Speech, Language and Hearing Sciences, Ghent University, Ghent, Belgium