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FeNO measurements in ppb before (0 min), and 30, 60, 90 and 120 minutes after the last dose of a food-antigen challenge. The results are grouped at the different time points by food-antigen challenge results, negative (Neg0, Neg30, Neg60, Neg90 or Neg120) or positive (Pos0, Pos30, Pos60, Pos90 or Pos120), and plotted as median value with lower and upper quartiles.
