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But it should not promise to cure gum disease, reverse smoking damage, or remove all stains immediately
Thanks a lot, Camel
As smoke passes through the glass joint tip, the cooler temperature of the glass absorbs some of the heat from the hot smoke, gradually lowering the temperature of the smoke, allowing for bigger hits with each pull
The target sample size was 636, based on power analysis for the primary research question using G*Power, with 90% power to determine an effect size (f2) of 0.02 on our primary outcome at an alpha level of 0.05
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