title: Reply.
authors: Sections of Pediatric Emergency Medicine and Gastroenterology, Department of Pediatrics, Alberta Children's Hospital, University of Calgary, Calgary, Alberta, Canada.
authors: Stephen B
authors: SB
authors: Freedman
authors: Department of Pediatrics, Stollery Children's Hospital, University of Alberta, Edmonton, Alberta, Canada.
authors: Lisa
authors: L
authors: Hartling