_:vb50948919 "ls:IEDB"^^ . _:vb50948919 . _:vb50948919 . _:vb50948919 "url:http://en.wikipedia.org/wiki/Stiff_person_syndrome"^^ . _:vb50948919 . _:vb50948919 . _:vb50948919 "A movement disease that is of unknown etiology characterized by progressive rigidity."^^ . _:vb50948919 .