Am J Gastroenterol 2017;112:1365; doi:10.1038/ajg.2017.214
Correction to: Following the publication of this paper the Publisher noted that the title in HTML was incorrect and the article included the incorrect Supplementary Video File. The incorrect file has now been replaced with the correct file.
The Publisher wishes to apologise for any inconvenience caused by this error.
SUPPLEMENTARY MATERIAL is linked to the online version of the paper at http://www.nature.com/ajg