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Scheme of COS regulation in hair growth. Back of C57BL/6 mice was shaved and topically treated with vehicle (ethanol) or COS for 15 days. A, The gross image of dorsal skin (Upper Panel) and histopathological results are provided (Lower Panel). B, A representative scheme how COS regulates the WNT/ β‐catenin and Shh pathway in human hair dermal follicle papilla cells
