Footnotes

• Contributors All authors have participated in writing the manuscript.

• Funding This research received no specific grant from any funding agency in the public, commercial or not-for-profit sectors.

• Competing interests None declared.

• Patient consent Detail has been removed from this case description/these case descriptions to ensure anonymity. The editors and reviewers have seen the detailed information available and are satisfied that the information backs up the case the authors are making.

• Provenance and peer review Not commissioned; externally peer reviewed. This paper was reviewed by Nick Kane, Bristol, UK.