B Abbal, O Choquet, A Gourari, N Bouic, A Massone, et al.. Enhanced visual acuity with echogenic needles in ultrasound-guided axillary brachial plexus block: a randomized, comparative, observer-blinded study..
Minerva Anestesiologica, Edizione Minerva Medica, 2015, 81 (4), pp.369-78.
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