_:vb50940937 "A developmental and epileptic encephalopathy characterized by onset of intractable seizures and hypotonia in the first days or weeks of life and severely delayed psychomotor development that has_material_basis_in homozygous or compound heterozygous mutation in the MDH2 gene on chromosome 7q11."^^ . _:vb50940937 . _:vb50940937 . _:vb50940937 . _:vb50940937 . _:vb50940937 "url:https://www.ncbi.nlm.nih.gov/pubmed/27989324"^^ . _:vb50940937 .