1 Donders Center for Neurosciences, Department of Otorhinolaryngology, Radboud University Medical Center, Nijmegen, Netherlands.
2 Department of Otorhinolaryngology/Head and Neck Surgery, University Medical Center Groningen, University of Groningen, Groningen, Netherlands; Research School of Behavioral and Cognitive Neurosciences, Graduate School of Medical Sciences, University of Groningen, Groningen, Netherlands.