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Birthdays of multiciliated ependymal cells. To determine the birth date of ependymal cells, mice were exposed to BrdU at E10, E12, E14, E16, E18, or P0, P2, and P4 and killed at P90. Bars show the mean number of BrdU and S100β double-labeled cells per 20 sections of the lateral ventricular wall of adult mice.
