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. 2022 May 26;9:895699. doi: 10.3389/fmed.2022.895699

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Copyright © 2022 Tamai, Teshima, Tsunoda, Kamata and Sato.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Skin biopsy of the scalp findings before (A–C) and 1 year after ruxolitinib treatment began (D–F). Hematoxylin and eosin stains (A,D; ×200) and immunohistochemical stains for CD4 (B,E; ×200) and CD8 (C,F; ×200) showed that infiltrative CD8-positive T cells disappeared after treatment.