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a–d Dot plots representing total CD4 (a), non-memory (CD45RO−CD4+) (b), memory (CD45RO+CD4+) (c), and regulatory (CD4+CD25+FoxP3+CD127lo) T cells (d) in patients with Chiari malformation (CM), medulloblastoma (MBL), and other posterior fossa tumors (PFT) demonstrating significantly lower counts of these lymphocyte subsets in patients with posterior fossa tumors as compared to control CM patients (p values are from Kruskal–Wallis test)
