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. 2022 Feb 23;12:839899. doi: 10.3389/fonc.2022.839899

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Copyright © 2022 Wang, Wang, Ai, Zhang, Li, Wang, Jiang, Yan, Liu, Wang, Xiong, Wang and Liu

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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Diagram of transverse and longitudinal diameter of the third lumbar paravertebral muscle group. Ll, maximum diameter in horizontal direction; L2,maximum diameter in vertical direction.