Clinical characteristics of the study groups.

a In this group, 51 patients of group 1 with active CD and follow-up serology under gluten-free diet (GFD) are included.b For the other 21 patients, the original histology was not available. In one patient diagnosis was done according to the new ESPGHAN guidelines without biopsy [18].c The 36 patients with family history of CD were from 23 different families.celiac disease (CD), gluten-free diet (GFD).Clinical characteristics of the study groups.