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. 2013 May 16;2013:945895. doi: 10.1155/2013/945895

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Copyright © 2013 Marcy C. McCall et al.

This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Box 1 — The AMSTAR tool criteria.