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The "Combined Regimen" values in Figure 1 were erroneously altered. Please see the corrected Figure 1 here: http://plosone.org/corrections/pone.0071659.g001.cn.tif
The P-Values in Table 1 were erroneously altered. Please see the corrected Table 1 here: http://plosone.org/corrections/pone.0071659.t001.cn.tif
Competing Interests: No competing interests declared.
