The West Otago illness.
D004196:Disease Outbreaks / Q000453:epidemiology*; D005221:Fatigue / Q000453:epidemiology; D005260:Female; D005500:Follow-Up Studies; D006261:Headache / Q000453:epidemiology; D006801:Humans; D008297:Male; D009520:New Zealand; D010146:Pain / Q000453:epidemiology