<scp>EXPRESSION OF CONCERN</scp> : Dermal Papilla Cell‐Secreted Biglycan Regulates Hair Follicle Phase Transit and Regeneration by Activating Wnt/β‐Catenin

N. Zhu, J. Yan, W. Gu, Q. Yang, E. Lin, S. Lu, B. Cai, B. Xia, X. Liu, C. Lin, "Dermal Papilla Cell-Secreted Biglycan Regulates Hair Follicle Phase Transit and Regeneration by Activating Wnt/β-Catenin," Experimental Dermatology 33, no. 1 (2024): e14969, https://doi.org/10.1111/exd.14969. This Expression of Concern is for the above article, published online on 15 November 2023 in Wiley Online Library (wileyonlinelibrary.com), and has been issued by agreement between the journal Editor-in-Chief, Akimichi Morita, and John Wiley & Sons Ltd. The Expression of Concern has been agreed upon following the identification of duplicated GAPDH bands in Figures 1C and 2C. Additional concerns were raised about the authenticity of bands in Figures 2C and 3C, which lacked characteristics typically associated with original experimental data. Although the authors cooperated and submitted data, the materials provided did not meet the standards for raw data and were insufficient to validate the figures. The editors have decided to issue an Expression of Concern to inform readers of these concerns.