_:vb50940058 "A Lynch syndrome that has_material_basis_in heterozygous mutation in the PMS2 gene on chromosome 7p22."^^ . _:vb50940058 . _:vb50940058 . _:vb50940058 "url:https://www.ncbi.nlm.nih.gov/pubmed/8072530"^^ . _:vb50940058 . _:vb50940058 . _:vb50940058 .