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Histological observations of hair follicles in C57BL/6 mice. The dorsal skin surfaces of the mice were shaved, and then test compounds were topically applied for 3 weeks. Vertical (A-E) and coronal (F-J) views of the hair follicles. C, no treatment; Mx, penetrating Mx alone; US, US combined with penetrating Mx; US+MBs, US combined with MBs and penetrating Mx; US+Mx-COL-MBs, US combined with Mx-COL-MBs.
