title: Reply to Dr Bendtsen.
authors.affiliation: Department of Anaesthesia Centre of Head and Orthopaedics Copenhagen University Hospital Rigshospitalet, Copenhagen Denmark Department of Anaesthesia Aleris-Hamlet Hospitals Copenhagen Søborg, Denmark Department of Radiology Aleris-Hamlet Hospitals Copenhagen Søborg, Denmark Department of Anaesthesia Centre of Head and Orthopaedics Copenhagen University Hospital Rigshospitalet, Copenhagen Denmark.
authors.forename: Pia
authors.initials: P
authors.lastname: Jæger
authors.forename: Jørgen
authors.initials: J
authors.lastname: Lund
authors.forename: Morten T
authors.initials: MT
authors.lastname: Jenstrup
authors.forename: Vibeke
authors.initials: V
authors.lastname: Brøndum
authors.forename: Jørgen B
authors.initials: JB
authors.lastname: Dahl
mesh_terms: D000577:Amides / Q000008:administration & dosage*; D000779:Anesthetics, Local / Q000008:administration & dosage*; D019645:Arthroplasty, Replacement, Knee; D005260:Female; D005267:Femoral Nerve; D006801:Humans; D008297:Male; D009407:Nerve Block / Q000379:methods*; D010149:Postoperative Pain / Q000517:prevention & control*; D052097:Quadriceps Muscle / Q000294:innervation*
chemical_list: D000577:Amides; D000779:Anesthetics, Local