Age-related loss of outer hair cells was increased by OC lesion, but not by chronic conductive hearing loss.

<p>Mean survival (± SEMs) of outer hair cells (A) and inner hair cells (B) as a function of cochlear location. Cochleas were harvested at 64 wks. Groups and group sizes are as defined in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0142341#pone.0142341.g002" target="_blank">Fig 2</a>. Key in A also applies to B.