title: Reply to Chen et al.
authors.forename: Jun-Gol
authors.initials: JG
authors.lastname: Song
authors.forename: In Cheol
authors.initials: IC
authors.lastname: Choi
mesh_terms: D000769:Anesthesia, Inhalation / Q000379:methods*; D000771:Anesthesia, Intravenous / Q000379:methods*; D005260:Female; D006801:Humans; D008297:Male; D010149:Postoperative Pain / Q000517:prevention & control*; D013908:Thoracotomy / Q000009:adverse effects*