title: Reply.
authors.affiliation: Section of Allergy and Immunology, Aurora, Colo; University of Colorado Denver School of Medicine, Aurora, Colo.
authors.forename: William C
authors.initials: WC
authors.lastname: Anderson
authors.affiliation: Department of Pediatrics, Children's Hospital Colorado, Aurora, Colo. Electronic address: Stanley.Szefler@childrenscolorado.org.
authors.forename: Stanley J
authors.initials: SJ
authors.lastname: Szelfer