Phrenic palsy and analgesic quality of continuous supraclavicular vs. interscalene plexus blocks after shoulder surgery. - Wiesmann, T.; Feldmann, C.; Müller, H. H.; Nentwig, L.; Beermann, A.; El‐Zayat, B. F.; Zoremba, M.; Wulf, H.; Steinfeldt, T. (Acta Anaesthesiologica Scandinavica, 2016)