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Contributors EN reviewed the patient in the clinic and produced the first draft of the manuscript. SH revised the manuscript, prepared it for submission and prepared a revised manuscript in line with the reviewers' comments. NJ contributed to discussion and final draft of the manuscript.
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 Obtained.
Provenance and peer review Not commissioned; externally peer reviewed.
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