GLI3 and polysyndactyly 4: Congenital abnormalities associated with human GLI3 are listed under the term “GLI3 morphopathies”, including Greig cephalopolysyndactyly syndrome (GCPS), non‐syndromic polydactyly, Pallister Hall syndrome (PHS), acrocallosal syndrome, preaxial polydactyly type IV (PPD‐IV) and postaxial polydactyly type A (PAPA) (Vortkamp et al.