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. 2012 Sep 24;7(9):e45558. doi: 10.1371/journal.pone.0045558

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© 2012 Kim 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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The correlation analysis between the dose percent of 6-MP and MTX in each patient showed a statistically significant linear relationship (R ² = 0.628, P = 0.00).