Retraction Note to: Dig Dis Sci (2012) 57:1838–1846 https://doi.org/10.1007/s10620-012-2108-5

The Editor-in-Chief has retracted this article [1] because Figure 3c appears to have been modified and reused as Figure 3d. An investigation by Zhengzhou University has confirmed that this figure was modified and reused. The data reported in this article are therefore unreliable. None of the authors has responded to any correspondence from the editor and the publisher about this retraction.