title: In Reply.
authors.affiliation: Department of Anesthesiology and Pain Medicine, Konkuk University Medical Center, and Department of Medicine, Institute of Biomedical Science and Technology, Konkuk University School of Medicine, Seoul, Korea (S.-H.K.). yshkim75@daum.net.
authors.forename: Woon-Seok
authors.initials: WS
authors.lastname: Kang
authors.forename: Tae-Hoon
authors.initials: TH
authors.lastname: Kim
authors.forename: Seong-Hyop
authors.initials: SH
authors.lastname: Kim