After the publication of this work
, we noticed an error whereby the images of Figure
1 and Figure
2 are interchanged and therefore do not correspond to their legends. The image of Figure
1 belongs to Figure
2 and vice versa. The corrected figures are given below.
This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.