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. 2014 Jun 20;9(6):e99991. doi: 10.1371/journal.pone.0099991

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This is an open-access article distributed under the terms of the Creative Commons Public Domain declaration, which stipulates that, once placed in the public domain, this work may be freely reproduced, distributed, transmitted, modified, built upon, or otherwise used by anyone for any lawful purpose.

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(A) Hair keratin Krt71 was detected in the papillary layer adjacent to the blood vessels (right panel). Enlarged images are shown in the middle panel (Krt71 green, Notch1 red, DAPI blue). Yellow dotted circles and white arrows show the blood vessels in which erythrocytes are detected (insert). Sox2 was expressed in basal cells in the papillary layer (left panel, Sox2 green, Notch1 red, DAPI blue).