Footnotes

• Correction notice This article has been corrected since it was published Online First. The provenance and peer review statement has been corrected.

• Contributors AP, MB, PGS, DH have managed the patient. DH, SA, MB have prepared the manuscript and images and the final manuscript version was revised and approved by all the authors. MB is the guarantor and takes responsibility for the integrity of the work as a whole.

• Competing interests None.

• Provenance and peer review Not commissioned; externally peer reviewed.