title: Chronic fatigue syndrome and depression: conceptual and methodological ambiguities.
authors.forename: C
authors.initials: C
authors.lastname: Ray
mesh_terms: D003866:Depressive Disorder / Q000175:diagnosis / Q000209:etiology / Q000523:psychology*; D015673:Fatigue Syndrome, Chronic / Q000175:diagnosis / Q000209:etiology / Q000523:psychology*; D006801:Humans; D011602:Psychophysiologic Disorders / Q000175:diagnosis / Q000209:etiology / Q000523:psychology*; D012803:Sick Role; D013001:Somatoform Disorders / Q000175:diagnosis / Q000209:etiology / Q000523:psychology*