From the Centers for Disease Control and Prevention. Outbreak of unexplained illness--Washington, 1994.
D000293:Adolescent; D000328:Adult; D002648:Child; D004196:Disease Outbreaks; D005260:Female; D006261:Headache; D006801:Humans; D008297:Male; D009325:Nausea; D012307:Risk Factors; D012574:Schools; D018877:Sick Building Syndrome / Q000453:epidemiology*; D013001:Somatoform Disorders / Q000453:epidemiology*; D014861:Washington / Q000453:epidemiology