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Apoptotic cell counts from haematoxylin and eosin stained sections. Numbers are averaged from at least 5 sections per animal 24 hours or 7 days following intrathecal injection on postnatal day 3, 7 and 21. Counts following intrathecal saline or any dose of intrathecal clonidine did not differ at any time point (n.s. one way ANOVA).
