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. 2013 Jan 28;8(1):e54838. doi: 10.1371/journal.pone.0054838

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© 2013 Da 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) Non-treatment group specimen at 3 months after surgery. (B) Non-treatment group specimen at 6 months. (C) Control group specimen at 3 months. (D) Control group specimen at 6 months. (E). Experimental group specimen at 3 months. (F) Experimental group specimen at 6 months.