title: No hard evidence on ultrasound-guided versus conventional regional anesthesia.
authors.forename: Michael H
authors.initials: MH
authors.lastname: Andreae
mesh_terms: D000698:Analgesia / Q000379:methods*; D000765:Anesthesia, Conduction / Q000379:methods*; D019317:Evidence-Based Medicine; D006801:Humans; D012196:Review Literature as Topic; D018084:Ultrasonography, Interventional