GTF2I and Williams syndrome: At the same time, in a study based on the molecular basis of Williams–Beuren syndrome (WBS), they found that the transcription of CFDP1 gene is directly regulated by the TFII‐I transcription factor family, which provides a basis for further research on the facial dysmorphism of WBS caused by haploidy deficiency of GTF2I and GTF2IRD1.20