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For an average of 10 years, they followed up on the participants by measuring levels of fine particulate matter, nitrogen oxide, black carbon and ozone outside their homes and carrying out CT scans to track the development of emphysema and lung decline

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Each pack contains 20 cigarettes , and a full carton includes 10 packs , totaling 200 cigarettes per box , catering to both individual buyers and those purchasing in bulk

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