_:vb50946289 . _:vb50946289 . _:vb50946289 . _:vb50946289 . _:vb50946289 . _:vb50946289 "A developmental and epileptic encephalopathy characterized by onset around 5 months of age of infantile spasms, hypsarrhythmia on EEG, and severely delayed psychomotor development with impaired or absent walking and language skills that has_material_basis_in heterozygous mutation in NEUROD2 on chromosome 17q12."^^ . _:vb50946289 "url:https://pubmed.ncbi.nlm.nih.gov/30323019/"^^ .