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. 2023 Sep 7;42(7):1133–1149. doi: 10.1038/s41587-023-01934-1

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© The Author(s) 2023

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Extended Data Fig. 1 — a, Quartet LCLs were cultured in suspension with typical cell clusters. At least six images were captured under phase-contrast microscopy (X20), and representative images were shown (scaled bar 80 µm). b, Normal karyotypes of the LCLs were shown. c, 15 STR loci were used for identification of Quartet monozygotic twins’ family. Importantly, there were no differences between results from DNAs isolated from LCLs and primary blood.