Depth of cervical plexus block and phrenic nerve blockade: a randomized trial.
Mathias OppererReinhard KaufmannMatthias MeissnitzerFlorian Karl EnzmannChristian DingesWolfgang HitzlJürgen NawratilAndreas KoköferPublished in: Regional anesthesia and pain medicine (2022)
EudraCT 2017-001300-30.