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Correspondence: U. Seidler, Department of Gastroenterology, Hepatology and Endocrinology, Hannover Medical School, Carl-Neuberg-Straße 1, 30625 Hannover, Germany, e-mail: seidler.ursula@mh-hannover.de
Conception and design of the experiments: S.Y., C.C.Y., and U.S.; collection, analysis, and interpretation of data: S.Y., G.Ch., L.M., M.C., A.C., L.L., M. L., J.G., A.K.S., B.R., O.B., A.B..., M.G., D.B., P.H., S.H., and U.S.; drafting the article S.Y., G.Ch., B.R., and U.S.; and revising it critically for important intellectual content: B.R., A.B..., M.G., C.C.Y., S.H., and U.S. All authors approved the final version of the manuscript.
We thank Regina Engelhardt, Brigitte Rausch, Natascha Cirpka, Silke Thiele, and Denise Renner for their help with the animal breeding and genotyping, and we thank the endoscopy team from the Department of Gastroenterology, Hepatology and Endocrinology for their dedication in biopsy acquisition.
We thank Andrew Short for helpful suggestions regarding language, clarity, and style.
The authors have no conflict of interest to disclose.
This work was supported by a grant from the German Science Foundations grants SFB621-C9 and Se460/9-6 (to U.S.) and by the Volkswagenstiftung (to U.S.) and the Hochschulinterne Leistungsförderung (HiLF) from Hannover Medical School (to S.Y.).
© 2014, The Author(s).