title: The prevalence of chronic fatigue syndrome in Iceland--a national comparison by gender drawing on four different criteria.
authors.forename: Eirikur
authors.initials: E
authors.lastname: Lindal
authors.forename: Jon G
authors.initials: JG
authors.lastname: Stefansson
authors.forename: Sverrir
authors.initials: S
authors.lastname: Bergmann
mesh_terms: D000328:Adult; D015673:Fatigue Syndrome, Chronic / Q000175:diagnosis* / Q000453:epidemiology* / Q000523:psychology; D005260:Female; D006801:Humans; D007055:Iceland / Q000453:epidemiology; D008297:Male; D012107:Research Design; D012737:Sex Factors