_:vb50941001 . _:vb50941001 . _:vb50941001 . _:vb50941001 . _:vb50941001 . _:vb50941001 "A developmental and epileptic encephalopathy characterized by onset in the first few months of life of refractory seizures andseverely impaired or absent developmental progress that has_material_basis_in heterozygous mutation in the SIK1 gene on chromosome 21q22."^^ . _:vb50941001 "url:https://www.ncbi.nlm.nih.gov/pubmed/25839329"^^ .