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Comparison of R-squared and confidence interval values between the main models and sensitivity analyses shows that models using cross-correlation lag structures, while controlling for health expenditure, produced higher R-squared values and tighter confidence intervals than those using geometric lag structures or models that did not control for health expenditure (please see Appendix Tables A2A4 for details)

These help but dont remove all residue or smell from tobacco smoke

[40] Smoking cessation [edit] Whether e-cigarettes help people quit smoking is debated

The vast majority of private businesses, employers, and public transport operators include heated tobacco products within their broader "no smoking or vaping" policies

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