title: Reply to dr Andersen and Zaric.
authors.affiliation: Department of Anesthesia and Pain Management Toronto Western Hospital University Health Network University of Toronto Toronto, Canada.
authors.forename: Kyle R
authors.initials: KR
authors.lastname: Kirkham
authors.forename: Anahi
authors.initials: A
authors.lastname: Perlas
mesh_terms: D000698:Analgesia / Q000379:methods*; D000779:Anesthetics, Local / Q000008:administration & dosage*; D019645:Arthroplasty, Replacement, Knee / Q000009:adverse effects*; D004434:Early Ambulation; D005260:Female; D006801:Humans; D008297:Male; D009407:Nerve Block; D010149:Postoperative Pain / Q000517:prevention & control*
chemical_list: D000779:Anesthetics, Local