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Carbonaceous particulate matter on the lung surface from adults living in São Paulo, Brazil

Fig 2

Image of the lung surface.

Standard crops using Image J software. In clockwise order: A. Non-smoker, female, 85 yr; B. Smoker, male, 70 yr; C. Non-smoker subject, female, 76 yr; D. Smoker, female, 47 yr.

doi: https://doi.org/10.1371/journal.pone.0188237.g002