Based on the Tphe‐cell frequency among CD4+ T cells (Figure 1d) and the fraction of gluten reactivity within the generated TCCs (Figure 2e) we calculated the percentage of gluten‐specific cells per total CD4+ gut T cells to be 1.9% in the five untreated CeD patients from whom TCCs were generated (Figure 2f). The gene discussed is CD4; the disease is cranioectodermal dysplasia.