Correction to: Experimental & Molecular Medicine (2011) 43(3), 138-145; https://doi.org/10.3858/emm.2011.43.3.016; Published Online: 7 February 2011

After publication of this article, the authors noticed an error in the figure section.

The correct figures of this article should have read as below.

Fig. 2
figure 2

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Fig. 3
figure 3

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Fig. 4
figure 4

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The authors apologize for any inconvenience caused.