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Luedi, Markus M; Upadek, Vanessa; Vogt, Andreas; Steinfeldt, Thorsten; Eichenberger, Urs; Sauter, Axel (2019). A Swiss nationwide survey shows that dual guidance is the preferred approach for peripheral nerve blocks. Scientific Reports, 9(1), p. 9178. Nature Publishing Group 10.1038/s41598-019-45700-3
