Insightfully, we found that during HC regeneration, Ad-Atoh1-infected cells start to express Tuj1, a neuronal marker, before the expression of HC genes including Myo7a. At this stage, TUJ1+ neurites have migrated toward the TUJ1+ cells induced by Ad-Atoh1 infection to form likely connections (Figures 8d,e, Supplementary Figure 4, and Supplementary Videos 3, 4). The gene discussed is ATOH1; the disease is infection.