title: Reply.
authors.affiliation: Children's Hospital Colorado and University of Colorado School of Medicine, Aurora, Colo. Electronic address: Andrew.liu@childrenscolorado.org.
authors.forename: Andrew H
authors.initials: AH
authors.lastname: Liu
authors.affiliation: Henry Ford Health System, Detroit, Mich.
authors.forename: Edward M
authors.initials: EM
authors.lastname: Zoratti
authors.affiliation: Ann and Robert H. Lurie Children's Hospital of Chicago, Chicago, Ill.
authors.forename: Jacqueline A
authors.initials: JA
authors.lastname: Pongracic
authors.affiliation: Rho Federal Systems Division, Chapel Hill, NC.
authors.forename: Denise C
authors.initials: DC
authors.lastname: Babineau
authors.affiliation: Rho Federal Systems Division, Chapel Hill, NC.
authors.forename: Cynthia M
authors.initials: CM
authors.lastname: Visness
authors.affiliation: National Institute of Allergy and Infectious Diseases, Bethesda, Md.
authors.forename: Peter J
authors.initials: PJ
authors.lastname: Gergen
authors.affiliation: National Institute of Allergy and Infectious Diseases, Bethesda, Md.
authors.forename: Alkis
authors.initials: A
authors.lastname: Togias
authors.affiliation: University of Wisconsin School of Medicine and Public Health, Madison, Wis.
authors.forename: William W
authors.initials: WW
authors.lastname: Busse
mesh_terms: D006801:Humans; D006967:Hypersensitivity; D010641:Phenotype