title: Author's Reply.
authors.affiliation: Department of Pediatrics, Washington University School of Medicine, St. Louis, Missouri; Department of Pediatrics, Goryeb Children's Hospital, Morristown, New Jersey.
authors.forename: Philip T
authors.initials: PT
authors.lastname: Levy
authors.affiliation: Department of Pediatrics, Washington University School of Medicine, St. Louis, Missouri.
authors.forename: Gautam K
authors.initials: GK
authors.lastname: Singh