Author's Response: Re: Stratifying Cystic Fibrosis Risk for Newborn Screen Infants With Equivocal Sweat Chloride Levels.

Address: Discipline of Paediatrics, School of Women's and Children's Health, Faculty of Medicine, University of New South Wales, Sydney, Australia; Sydney Children's Hospital Randwick, Sydney, Australia; Division of Gastroenterology, Hepatology and Nutrition, Department of Paediatrics, The Hospital for Sick Children, Toronto, Ontario, Canada.; Physiology and Experimental Medicine, Research Institute, and Division of Respiratory Medicine, Department of Paediatrics, The Hospital for Sick Children, Toronto, Ontario, Canada.; Division of Gastroenterology, Hepatology and Nutrition, Department of Paediatrics, and Physiology and Experimental Medicine, Research Institute, The Hospital for Sick Children, Toronto, Ontario, Canada [email protected].