Cover legend:Immunofluorescence staining for otoferlin expression in whole mounts of mouse organ of Corti and crista ampullaris. Both cochlear and vestibular sensory hair cells exhibit an intense otoferlin staining. A defect in otoferlin expression silences the auditory hair cell ribbon synapse. For more information, see the article by Beurg et al. in this issue (pages 1798–1803).