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. 2024 Nov 18;14:28484. doi: 10.1038/s41598-024-79045-3

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© The Author(s) 2024

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 licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence 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 licence, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 2 — Survival curves for (a) HSG, (b) MG63, (c) SAS, and (d) G-361 cells after proton beam irradiation alone (solid line), proton beam irradiation with 20 ppm of boron (dash-dotted line), and proton beam irradiation with 80 ppm of boron (dashed line). Data are presented as the mean ± standard deviation, fitted to the linear-quadratic model. Significantly different at * P < 0.05 and ** P < 0.01. G-361 human malignant melanoma cell, HSG human salivary gland tumor cell, MG63 human osteosarcoma cell, PBI proton beam irradiation, SAS human tongue squamous-cell carcinoma cell.