acknowledgements We acknowledge and thank the patients who participated in this study and the contribution of the personnel working at the endoscopy suite, the surgical theatre and the pathology department for their assistance at all study procedures. Special thanks to W Boersma-van Ek for her technical assistance in the laboratory.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.