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Current research focuses on its role within experimental models related to skin biology, connective tissue mechanisms, and cellular resilience

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2011 Aug;94(8):4016-27

Unsurprisingly, risk is proportional to the extent of exposure 270 and is greater than additive when combined with cigarette smoking (risk of lung cancer mortality 2.2 times greater than additive for joint exposure) 271 , although evidence indicates an increased risk even after accounting for smoking 263,272 as well as when restricting the analysis to those who have never smoked 267