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Transcript levels of Shh signaling–related genes in the skin and BCCs of hairless and haired mice. Semiquantitative/RT-PCR data were represented as means ± SEM of at least three samples (n = 3), with expression levels normalized to actin. ∗P < 0.05, ∗∗∗P < 0.001, relative to corresponding control (C). T, tumor; US, UVB-irradiated skin.
