4 4 Department of Otorhinolaryngology/Head and Neck Surgery, University Medical Center Groningen, University of Groningen, the Netherlands.
5 5 Graduate School of Medical Sciences, Research School of Behavioural and Cognitive Neurosciences, University of Groningen, the Netherlands.
6 6 Department of Otolaryngology, Head and Neck Surgery, Tübingen Hearing Research Center, Molecular Physiology of Hearing, University of Tübingen, Germany.