Early diagnosis of cystic fibrosis can improve children's growth

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Philip M Farrell, Dean (philip.farrell@mail.admin.wisc.edu) On behalf of the Wisconsin Cystic Fibrosis Neonatal Screening Group

University of Wisconsin Medical School, Madison, WI 53706, USA On behalf of the Wisconsin Cystic Fibrosis Neonatal Screening Group

EDITOR—Wald and Morris1 seem to have examined carefully our article on the nutritional benefits of neonatal screening in cystic fibrosis2 but they misunderstood some points and failed to grasp the potential advantages of preventing malnutrition in patients with cystic fibrosis.

They comment that our “study design is an ingenious one, but the analysis of the results is problematic.” Ironically, the most ingenious feature is the very element they criticise with their comment that “a difficulty that …