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Contributors BB and MM wrote the first draft of this work and no funding was received to write it. BB and MM drafted the manuscript and approved the final manuscript as submitted. BB, EB, IB and MM contributed to achieving the clinical diagnosis of the case.
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.
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