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Interventions should target quitting as the primary goal for smokers

We adjusted observations that were generated in subpopulations, because it was the only significant bias covariate identified by the bias covariate selection algorithm (Supplementary Table 7)

Thats the protein in red blood cells that carries oxygen from the lungs to the tissues throughout the body

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Researchers also obtained letters of support from the local police chief and district attorney stating they agreed not to prosecute participants since the purchase of e-cigarettes by minors is illegal in North Carolina