title: ME versus CFS.
authors: L O
authors: LO
authors: Simpson
mesh_terms: D015673:Fatigue Syndrome, Chronic / Q000097:blood / Q000145:classification / Q000175:diagnosis* / Q000382:microbiology; D005260:Female; D006801:Humans; D008297:Male; D012008:Recurrence; D009626:Terminology as Topic