Comparison based on an assessment of smoke from a scientific standard reference cigarette (approximately 9mg tar) and components released during use of a Velo pouch, in terms of the average of the 9 harmful components the World Health Organisation recommends to reduce in cigarette smoke.
What works, in order of impact Barriers during oral sex (the single most effective intervention)
doi: 10.1104/pp.112.209460 28 LeinonenR.AkhtarR.BirneyE.BowerL.Cerdeno-TrragaA.ChengY.et al
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When smoking duration was used as a continuous measure in place of cigarette pack years in the 3-category age of initiation model (Supplemental Table S3a in the online supplement), the association between childhood smoking and COPD was attenuated (aRR from 1.27 [95% CI=1.06, 1.51] to 1.16 [95% CI=0.99, 1.36])