title: Invited Commentary.
authors.affiliation: Medical Intensive Care Unit, Centre Hospitalier Universitaire de Besançon, Boulevard Fleming, 25030 Besançon, France. Electronic address: gpiton@chu-besancon.fr.
authors.forename: Gaël
authors.initials: G
authors.lastname: Piton
authors.affiliation: Medical Intensive Care Unit, Centre Hospitalier Universitaire de Besançon, Boulevard Fleming, 25030 Besançon, France.
authors.forename: Gilles
authors.initials: G
authors.lastname: Capellier