Reduced hemidiaphragmatic paresis with extrafascial compared with conventional intrafascial tip placement for continuous interscalene brachial plexus block: a randomized, controlled, double-blind trial.
Albrecht E., Bathory I., Fournier N., Jacot-Guillarmod A., Farron A., Brull R., 2017/04/01. British journal of anaesthesia, 118 (4) pp. 586-592. Peer-reviewed.
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