title: Letter to the Editor.
authors.affiliation: Department of Anesthesiology, Capio S:t Görans Sjukhus AB, Stockholm, Sweden. stellan.eriksson@capiostgoran.se.
authors.forename: Stellan
authors.initials: S
authors.lastname: Eriksson
authors.affiliation: Department of Anesthesiology, Capio S:t Görans Sjukhus AB, Stockholm, Sweden.
authors.forename: Sixten
authors.initials: S
authors.lastname: Bredbacka