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. 2023 Sep 7;29(9):e13454. doi: 10.1111/srt.13454

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© 2023 The Authors. Skin Research and Technology published by John Wiley & Sons Ltd.

This is an open access article under the terms of the http://creativecommons.org/licenses/by-nc-nd/4.0/ License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non‐commercial and no modifications or adaptations are made.

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Scatter plots of the one‐time and three consecutive measurements, showing Spearman's correlation coefficient (R²) and the p value of the left cheek testing point. (A) One‐time CSL and real SCL (B) One‐time SER and real SER.