title: The authors reply.
authors.affiliation: Department of Anesthesiology and Intensive Care Medicine, Pulmonary Engineering Group, University Hospital Dresden, Technische Universität Dresden, Dresden, Germany; Department of Anesthesiology and Intensive Care Medicine, Pulmonary Engineering Group, University Hospital Dresden, Technische Universität Dresden, Dresden, Germany, and IRCCS San Martino IST, Department of Surgical Sciences and Integrated Diagnostics, University of Genoa, Genoa, Italy; Department of Anesthesiology and Intensive Care Medicine, Pulmonary Engineering Group, University Hospital Dresden, Technische Universität Dresden, Dresden, Germany, and Laboratory of Pulmonary Investigation, Carlos Chagas Filho Biophysics Institute, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil; Department of Anesthesiology and Intensive Care Medicine, Pulmonary Engineering Group, University Hospital Dresden, Technische Universität Dresden, Dresden, Germany, and IRCCS San Martino IST, Department of Surgical Sciences and Integrated Diagnostics, University of Genoa, Genoa, Italy; Department of Anesthesiology and Intensive Care Medicine, Pulmonary Engineering Group, University Hospital Dresden, Technische Universität Dresden, Dresden, Germany; Institute of Nuclear Medicine, University Hospital Dresden, Dresden, Germany; Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital, Harvard University, Boston, MA; IRCCS San Martino IST, Department of Surgical Sciences and Integrated Diagnostics, University of Genoa, Genoa, Italy; Institute of Nuclear Medicine, University Hospital Dresden, Dresden, Germany; Department of Anesthesiology and Intensive Care Medicine, Pulmonary Engineering Group, University Hospital Dresden, Technische Universität Dresden, Dresden, Germany.
authors.forename: Andreas
authors.initials: A
authors.lastname: Güldner
authors.forename: Anja
authors.initials: A
authors.lastname: Braune
authors.forename: Lorenzo
authors.initials: L
authors.lastname: Ball
authors.forename: Pedro
authors.initials: P
authors.lastname: Leme Silva
authors.forename: Cynthia
authors.initials: C
authors.lastname: Samary
authors.forename: Angelo
authors.initials: A
authors.lastname: Insorsi
authors.forename: Robert
authors.initials: R
authors.lastname: Huhle
authors.forename: Ines
authors.initials: I
authors.lastname: Rentzsch
authors.forename: Claudia
authors.initials: C
authors.lastname: Becker
authors.forename: Liane
authors.initials: L
authors.lastname: Oehme
authors.forename: Michael
authors.initials: M
authors.lastname: Andreeff
authors.forename: Marcos Francisco
authors.initials: MF
authors.lastname: Vidal Melo
authors.forename: Tilo
authors.initials: T
authors.lastname: Winkler
authors.forename: Paolo
authors.initials: P
authors.lastname: Pelosi
authors.forename: Patricia
authors.initials: P
authors.lastname: Rieken Macedo Rocco
authors.forename: Jörg
authors.initials: J
authors.lastname: Kotzerke
authors.forename: Marcelo
authors.initials: M
authors.lastname: Gama de Abreu