In the study's "pessimistic" model, the researchers assumed that fewer people gave up smoking than are doing so under the current rate and that the health risks of e-cigarettes turned out to be worse than scientists' current understanding
however, these differences often became nonsignificant with longer follow-up periods
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When the aerosols of 4 commercially available e-liquids chosen from a top 10 list of Best E-Cigarettes of 2014 , were analysed by gas chromatography-mass spectrometry (GCMS) after heating, numerous compounds were detected, with nearly half of them not previously identified [4], thus suggesting that the heating process per se generates new compounds of unknown consequence
Always keep the device clean, especially around the contact points, to maintain optimal performance