title: Reply.
authors.affiliation: Dr von Hauner Children's Hospital, LMU Munich, Munich, Germany. Electronic address: markus.ege@med.lmu.de.
authors.forename: Markus J
authors.initials: MJ
authors.lastname: Ege
authors.affiliation: Animal Physiology & Immunology, TUM School of Life Sciences Weihenstephan, Freising, Germany.
authors.forename: Michael W
authors.initials: MW
authors.lastname: Pfaffl