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Smoking and vaping life history model We developed a Markov model to simulate population smoking and vaping behaviours, based on seven states (online supplemental figure S1 and table S1): never smoker (NS), current smoker (CS), never smoker current vaper (NSCV), dual user (DU), former smoker current vaper (FSCV), former smoker and/or former vaper (FSFV), never smoker former vaper (NSFV)

Building on multiple Phase 1 and Phase 2 clinical studies in both healthy people and people with a variety of clinical conditions showing safety of carbon monoxide at the low doses studied here, a clinical trial of low-dose, orally administered carbon monoxide in patients with Parkinsons disease is planned. Disclosures: There are relevant COI disclosures

By controlling compression and distribution automatically, these machines significantly reduce the likelihood of irregular burns, creating a smoother and more reliable smoking session

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The Pyramid These carry a distinctive taper to the head