title: The authors reply.
authors.affiliation: Department of Anesthesia and Critical Care/Division of Critical Care Medicine, Children's Hospital of Philadelphia, Philadelphia, PA; Department of Pediatrics/Division of Critical Care Medicine, University of Utah, Salt Lake City, UT; Department of Pediatrics/Division of Critical Care Medicine, Children's National Medical Center, Washington, DC.
authors.forename: Robert A
authors.initials: RA
authors.lastname: Berg
authors.forename: Vinay M
authors.initials: VM
authors.lastname: Nadkarni
authors.forename: Robert M
authors.initials: RM
authors.lastname: Sutton
authors.forename: Michael
authors.initials: M
authors.lastname: Dean
authors.forename: Murray
authors.initials: M
authors.lastname: Pollack