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Wnt signaling is reduced in aged bone grafts. Fig. 3-A Quantitative RT-PCR to evaluate relative expression levels of Wnt ligands and Wnt target (Fig. 3-B) genes in bone marrow (BM) harvested from young (blue bars; n = 3) and aged (white bars; n = 3) donors. Gene expression levels normalized to glyceraldehyde 3-phosphate dehydrogenase (GAPDH). Asterisk denotes p < 0.05.
