title: Reply to Drs Weller and Henshaw.
authors.affiliation: Department of Anaesthesia, Centre of Head and Orthopaedics, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark Department of Anaesthesia, Frederiksberg Hospital, Copenhagen University Hospital, Frederiksberg, 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: Dusanka
authors.initials: D
authors.lastname: Zaric
authors.forename: Zbigniew J
authors.initials: ZJ
authors.lastname: Koscielniak-Nielsen
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