_:vb50940961 "A developmental and epileptic encephalopathy characterized by onset of intractable seizures in the first year of life with impaired development or developmental regression after seizure onset that has_material_basis_in heterozygous mutation in the SCN8A gene on chromosome 12q13."^^ . _:vb50940961 "url:https://pubmed.ncbi.nlm.nih.gov/24888894/"^^ . _:vb50940961 . _:vb50940961 . _:vb50940961 . _:vb50940961 . _:vb50940961 "url:https://www.ncbi.nlm.nih.gov/pubmed/22365152"^^ . _:vb50940961 .