title: Grading autonomic dysfunction in chronic fatigue syndrome.
authors.forename: Alexandre C
authors.initials: AC
authors.lastname: Ferreira
authors.forename: Eduardo
authors.initials: E
authors.lastname: de Marchena
mesh_terms: D001342:Autonomic Nervous System Diseases / Q000175:diagnosis* / Q000209:etiology / Q000503:physiopathology; D015673:Fatigue Syndrome, Chronic / Q000150:complications / Q000175:diagnosis* / Q000503:physiopathology; D006801:Humans; D013575:Syncope / Q000175:diagnosis / Q000209:etiology / Q000503:physiopathology