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. 2021 Oct 12;12:715265. doi: 10.3389/fphys.2021.715265

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Copyright © 2021 Liu, Wingert, Wang, Zhang, Sun, Chen, Khalid, Gong, Xia, Jiang, Wang and Zheng.

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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Linear and non-linear regression fittings on the geometric parameters of calcifications. The regression line and curve are shown in dotted lines. (A) Volume and length. (B) Volume and surface distance. (C) Length and surface distance.