Symptoms of chronic non specific lung disease (CNSLD) in a group of school children--with a follow-up after three years.
D002648:Child; D002908:Chronic Disease; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008171:Lung Diseases / Q000453:epidemiology*; D008297:Male; D009426:Netherlands; D011379:Prognosis; D011795:Surveys and Questionnaires