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While we emphasize the importance of considering pack-years of smoking exposure, we recognize the potential for unmeasured confounding that is not captured by pack-years, which has been shown to be an imperfect measure of overall cigarette smoking history [36]

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Persistent hoarseness or voice changes lasting more than a few weeks can be an early warning sign of these conditions

The proposal isn't getting as warm of a reception from some mountain business owners, though, like Brooke Souhail

Ignoring Carbon Filter Capacity and Quality Not all activated carbon filter systems are equal