Cigarette butts have become such an everyday part of the landscape, that in many situations they are not seen as litter and are assumed to be less harmful than other types of litter, said Tom Rothfus , director of UIS field stations
But now research says, if a smoker is wheezing it could be an early sign of COPD, Chronic Obstructive Pulmonary Disease
However, as the percentage of tolerant users is generally unknown, the most probable value of MOE would lie in the range between non-tolerant and tolerant users (the gray-marked area in Figures 13)
COPD overlap (J44.x) : Chronic bronchitis with airflow obstruction (FEV1/FVC 38.5C or purulent sputum with systemic signs may suggest bacterial superinfection or pneumonia
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