title: Reply to Drs La Colla and Ben-David.
authors.affiliation: Department of Anaesthetics, Guy's & St Thomas' NHS Foundation Trust, London, United Kingdom Department of General Anesthesiology, Cleveland Clinic, Cleveland, OH Department of Anesthesiology, Moorfields Eye Hospital, London, United Kingdom Department of Anesthesia, Toronto Western Hospital, Toronto, Ontario, Canada.
authors.forename: Kariem
authors.initials: K
authors.lastname: El-Boghdadly
authors.forename: Hesham
authors.initials: H
authors.lastname: Elsharkawy
authors.forename: Anthony
authors.initials: A
authors.lastname: Short
authors.forename: Ki Jinn
authors.initials: KJ
authors.lastname: Chin