_:vb50944792 "url:https://www.ncbi.nlm.nih.gov/pubmed/16650084"^^ . _:vb50944792 . _:vb50944792 . _:vb50944792 "An essential tremor that has_material_basis_in heterozygous mutation in DRD3 on chromosome 3q13.31."^^ . _:vb50944792 . _:vb50944792 . _:vb50944792 .