_:vb50955281 . _:vb50955281 "url:https://www.ncbi.nlm.nih.gov/pubmed/3277755"^^ . _:vb50955281 . _:vb50955281 "url:https://www.ncbi.nlm.nih.gov/pubmed/9042920"^^ . _:vb50955281 "A syndrome characterized by chromosomal instability, microcephaly, growth retardation, immunodeficiency, cellular hypersensitivity to X-rays, and predisposition to cancer that has_material_basis_in homozygous or compound heterozygous mutation in NBN on chromosome 8q21.3."^^ . _:vb50955281 . _:vb50955281 . _:vb50955281 .