| http://www.w3.org/ns/prov#value | - Of the 8,336 subjects who answered the screening questionnaire based on the American Thoracic Society (ATS) questionnaire for chronic respiratory symptoms,16 3,465 subjects were excluded because they had at least one of the following: a history of smoking in the past year or for one or more pack-years (n = 1,431); a history of lung diseases including asthma, COPD, pulmonary tuberculosis, lung fibr
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