Footnotes

• Statements All the authors consented to publish this manuscript. Informed consent and releases from the parent(s)/guardian(s) and/or the patient were taken.

• Contributors DBB, AS and EJP contributed to initial patient assessment and follow-up, conception, drafting of manuscript, and final approval of manuscript. AP, AD and SKB contributed to conception, critical revision of content and final approval of manuscript. All authors are in agreement to be accountable for all aspects of the work in ensuring that questions related to the accuracy or integrity of any part of the work are appropriately investigated and resolved.

• Competing interests None declared.

• Patient consent for publication Consent obtained directly from patient(s).

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