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Eichenberger, Urs; Greher, Manfred; Curatolo, Michele; Kapral, Stefan (2006). [Ultrasound in anesthesiology--ultrasound in interventional pain therapy]. Anästhesiologie, Intensivmedizin, Notfallmedizin, Schmerztherapie, 41(11), pp. 760-6. Stuttgart: Thieme 10.1055/s-2006-958849
