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Contributors SD: drafting, review of literature, image labeling, cadaveric dissection, performed blocks. XS-B: review of literature, cadaveric dissection, performed blocks. AN: review of literature, manuscript editing and final proof. DS: scan interpretation, manuscript review.
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 Not required.
Provenance and peer review Not commissioned; internally peer reviewed.
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