Footnotes

• Contributors AD, HH and LS contributed to the conception of the work, the acquisition, analysis and interpretation of data. AD and HH revised the original form critically for important intellectual content and provided responses to reviewers’ comments. AD had a substantial contribution to drafting the work and worked out all the revised form. HH supervised the original manuscript and revised form. SC and LCL contributed to reviewing the original manuscript. Our acknowledgements to all the people who have contributed to the care of our patient.

• 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.

• Competing interests None declared.

• Patient consent for publication Parental/guardian consent obtained.

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