title: Can the early presence of autonomic dysfunction aid diagnosis in parkinsonism?
authors.forename: C J
authors.initials: CJ
authors.lastname: Mathias
mesh_terms: D001342:Autonomic Nervous System Diseases / Q000209:etiology*; D003937:Diagnosis, Differential; D006801:Humans; D020734:Parkinsonian Disorders / Q000175:diagnosis* / Q000503:physiopathology; D011237:Predictive Value of Tests; D012680:Sensitivity and Specificity