title: Natural history of idiopathic torsion dystonia.
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D002648:Child; D002675:Child, Preschool; D004422:Dystonia Musculorum Deformans / Q000175:diagnosis / Q000235:genetics; D005500:Follow-Up Studies; D006801:Humans; D007223:Infant; D008875:Middle Aged; D011379:Prognosis; D013997:Time Factors