Abstract
In his News Feature “Failure to protect?” (13 August, p. 729), C. Piller creates false impressions about the Vitamin D Kids Asthma Study (“Vit-D-Kids” or “VDKA”) (1) and its investigators. The story questions the study’s design, participant distribution, and reporting. The allegations in the story distort the study, which was carefully and ethically designed and appropriately diverse and reported.