Footnotes

• Contributors We were all involved in the diagnosis and care of the patient. JPN collected the clinical materials. XP performed literature review. THL verified the data and prepared the manuscript. All authors approved the final manuscript. THL is responsible for the overall content as guarantor.

• 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.

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