Epidemic myalgic encephalomyelitis.
D003937:Diagnosis, Differential; D004196:Disease Outbreaks; D004679:Encephalomyelitis / Q000175:diagnosis* / Q000453:epidemiology / Q000209:etiology; D005260:Female; D006801:Humans; D008297:Male; D009135:Muscular Diseases / Q000175:diagnosis* / Q000453:epidemiology / Q000209:etiology