Representative SEM pictures obtained from different cochlear locations from Atoh1-treated and untreated (control) ears one month after viral inoculation.

<p><i>A–C:</i> SEM images showing different extent and severity of damage from the control cochleae. <i>D–F:</i> SEM pictures of hair bundles from the Atoh1-treated ears. Missing hair bundles in panel <i>E</i> are marked by asterisks. The arrow indicates a Deiters' cell. Scale bars: 20 µm (<i>A</i>) and 10 µm (<i>B</i> to <i>F</i>).