title: Erratum to: A prospective observational study comparing a physiological scoring system with time-based discharge criteria in pediatric ambulatory surgical patients.
abstract: Erratum to: Can J Anesth/J Can Anesth DOI 10.1007/s12630-015-0428-6. In the published version, the first phrase of the introduction was incorrect and should read as follows: Since the inception of the postanesthesia care unit (PACU) in 1923, the question of when it is safe to discharge a patient has remained contentious. The publisher apologizes most sincerely for this typesetting error.
authors.affiliation: Department of Anesthesia and Pain Medicine, The Hospital for Sick Children, University of Toronto, 555 University Avenue, Toronto, ON, M5G 1X8, Canada.
authors.forename: James
authors.initials: J
authors.lastname: Armstrong
authors.affiliation: Department of Anesthesia and Pain Medicine, The Hospital for Sick Children, University of Toronto, 555 University Avenue, Toronto, ON, M5G 1X8, Canada.
authors.forename: Helen
authors.initials: H
authors.lastname: Forrest
authors.affiliation: Department of Anesthesia and Pain Medicine, The Hospital for Sick Children, University of Toronto, 555 University Avenue, Toronto, ON, M5G 1X8, Canada. mark.crawford@sickkids.ca.
authors.forename: Mark W
authors.initials: MW
authors.lastname: Crawford