GUIDELINES P.J. Hampton Corresponding Author Philip.Hampton@nhs.net guidelines@bad.org.uk orcid.org/0000-0001-6797-2697 Royal Victoria Infirmary, Newcastle upon Tyne, NE1 4LP U.K Corresponding author Philip Hampton Email: Philip.Hampton@nhs.net guidelines@bad.org.uk Contribution: Conceptualization (lead), Data curation (equal), Supervision (lead), Validation (equal), Writing - original draft (lead), Writing - review & editing (lead) Search for more papers by this author S.