_:vb50941264 . _:vb50941264 . _:vb50941264 "An orofacial cleft that has_material_basis_in variation in an enhancer of the IRF6 gene on chromosome 1q32."^^ . _:vb50941264 . _:vb50941264 . _:vb50941264 . _:vb50941264 "url:https://www.ncbi.nlm.nih.gov/pubmed/17702008"^^ .