Footnotes

• Editor's Note This commentary is being published simultaneously in the February 2015 issues of the five journals (listed alphabetically): Gastroenterology, Gastrointestinal Endoscopy, Gut, Journal of Hepatology, and Hepatology. The editors of the five journals collaborated equally on this effort and in that sense can be considered co-first authors. We wish to thank Dr Glenn Eisen, past editor of Gastrointestinal Endoscopy, for his initial involvement and support of this effort.

• © 2015 by the AGA Institute, the American Society for Gastrointestinal Endoscopy, BMJ Publishing Group Ltd and British Society of Gastroenterology, American Association for the Study of Liver Diseases, and European Association for the Study of the Liver.

• This article is being published jointly in Gastroenterology, Gastrointestinal Endoscopy, Gut, Hepatology, and Journal of Hepatology.

• Acknowledgements We thank our managing editors for helping facilitate the joint publication of this commentary in our five journals. All authors contributed equally to this effort.

• Competing interests None.

• Author names in bold designate shared co-first authors.