Fig. 4

Serum IL-2 data. IL-2 concentration baseline and after 4 h of gluten challenge is shown in subjects from each study group: a patients with celiac disease (CD), and b non-CD controls. The dotted red line indicates the cut-off for CD diagnosis. Lines connect results from individual patients. Centerlines in the box show the median; box limits indicate the 25th and 75th percentiles (IQR). Red dots represent subjects with positive fecal GIP