Katerina Vlantis should have been included as the fourth author in the byline.
Her affiliation is: 4 Institute for Genetics, University of Cologne, Cologne, Germany
The correct citation is: Becker S, Oelschlaeger TA, Wullaert A, Vlantis K, Pasparakis M, et al. (2013) Bacteria Regulate Intestinal Epithelial Cell Differentiation Factors Both In Vitro and In Vivo. PLoS ONE 8(2): e55620. doi:10.1371/journal.pone.0055620
Footnotes
Competing Interests: No competing interests declared.