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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
Ultrasound-guided injection to the dorsal proper digital nerve in its short axis with the dual imaging mode (Doppler vs. B mode). White arrowhead: dorsal proper digital nerve; black arrowhead: dorsal proper digital artery; arrow: needle. T: flexor tendons.