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. 2014 Mar 17;9(3):e92312. doi: 10.1371/journal.pone.0092312

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© 2014 Zhang et al

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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(A) Failure load; (B) Elastic modulus; (C) Energy absorption. *Statistically different from BCL (P<0.05). **Statistically different from SPD (P<0.05). ^#Statistically different from VLNR (P<0.05). ^·Statistically different from VL7R (P<0.05). ^··Statistically different from VL5R (P<0.05).