Statistics from Altmetric.com
Contributors ODT drafted the initial manuscript. AS, AD, DM, SM and PJS critically appraised and revised the manuscript.
Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.
Map disclaimer The depiction of boundaries on the map(s) in this article does not imply the expression of any opinion whatsoever on the part of BMJ (or any member of its group) concerning the legal status of any country, territory, jurisdiction or area or of its authorities. The map(s) are provided without any warranty of any kind, either express or implied.
Competing interests OT is a Trainee Associate Editor at Frontline Gastroenterology and has received grants for educational content from Gilead and for consumables from NIHR BRC. PJS is an Associate Editor at Frontline Gastroenterology. There are no other competing interests to declare.
Provenance and peer review Not commissioned; externally peer reviewed.
If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.