title: Chronic fatigue syndrome: a systematic review.
abstract: OBJECTIVE
  A systematic review of the literature about chronic fatigue syndrome (CFS).
  
  
  METHODS
  A search of the Medline database (via Ovid and PubMed) with the key words chronic fatigue syndrome, diagnosis, classification, epidemiology, etiology, physiopathology, metabolism, microbiology, immunology, virology, psychology, drug therapy, rehabilitation, and therapy. The reference lists of each article were examined for additional related articles.
  
  
  RESULTS
  CFS was defined in 1988 by the US Centes for Disease Control and Prevention. The prevalence of chronic fatigue syndrome has ranged from 0.2% to 0.7% in the general population. In 1994, the definition of CFS was revised by Fukuda et al. Despite various research in several topics (e.g. infection, immune systems, neuroendocrinology, autonomic activity, neuromuscular involvement), the pathophysiology remains unknown.
  
  
  CONCLUSIONS
  CFS, with its various major clinical and functional impacts, should be associated with a "biopsychosocial model". Progressive muscular rehabilitation, combined with behavioral and cognitive treatment, is an essential part of therapy.
authors.affiliation: Département des Sciences de la Motricité, Unité de Médecine Physique et Kinésithérapie-Réadaptation, Université de Liège, CHU Sart-Tilman, ISEPK, Belgique. D.Maquet@ulg.ac.be
authors.forename: D
authors.initials: D
authors.lastname: Maquet
authors.forename: C
authors.initials: C
authors.lastname: Demoulin
authors.forename: J M
authors.initials: JM
authors.lastname: Crielaard
mesh_terms: D015673:Fatigue Syndrome, Chronic / Q000175:diagnosis / Q000503:physiopathology* / Q000523:psychology / Q000628:therapy*; D006801:Humans