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. 2009 Mar 5;4(3):e4687. doi: 10.1371/journal.pone.0004687

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Ke 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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HOX genes located in 4 clusters, HOXA (A), HOXB (B), HOXC (C) and HOXD (D), in chromosome 7, 17, 12 and 2 of the human genome, respectively. The mRNA expression values represent the average±SD of three independent triplicate microarray data.