_:vb50942443 . _:vb50942443 . _:vb50942443 "url:https://www.ncbi.nlm.nih.gov/pubmed/24858907"^^ . _:vb50942443 . _:vb50942443 . _:vb50942443 . _:vb50942443 "An amelogenesis imperfecta that has_material_basis_in homozygous mutation in the ameloblastin gene (AMBN) on chromosome 4q13."^^ .