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Contributors JPD conceived and drafted the manuscript. AMC edited the manuscript. AE-D provided the imaging review and description.
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 Obtained.
Provenance and peer review Not commissioned. Externally peer reviewed by Adolfo Bronstein, London, UK.
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