Phrenic nerve block caused by interscalene brachial plexus block: breathing effects of different sites of injection.
Lars BergmannStefan MartiniMiriam KesselmeierWolf ArmbrusterThomas NotheisenMichael AdamzikRϋdiger EichholzPublished in: BMC anesthesiology (2016)
German Clinical Trials Register (DRKS number 00009908 , registered 26 January 2016).