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Illustration of the mammalian cochlea. The red cells are HCs, and the green cells are Lgr5+ progenitors. IHC, inner hair cell; OHC, outer hair cell; GER, greater epithelial ridge; LER, lesser epithelial ridge; DC, Deiters’ cell; OPC, outer pillar cell; IPC, inner pillar cell; IPhC, inner phalangeal cell; IBC, inner border cell.
