CD79A and cranioectodermal dysplasia: In children with suspected CeD, only 66% of the hospitals strictly followed the recommendation to measure exclusively total IgA and TGA‐IgA for initial testing, in 29%, unnecessary first‐line testing was conducted (TGA‐IgG, DGP‐IgA, DPG‐IgG, anti‐gliadin antibodies [AGA]‐IgA, EMA‐IgA or IgG), while 5% used an insufficient test combination for effective case finding (total IgA without specific autoantibody test, TGA‐IgG instead, TGA‐IgA without total IgA or IgG‐based test) (Table S1A,B).