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Participants were grouped based on how many cigarettes they smoked per day and whether they had quit

Following her 2006 lung cancer diagnosis , doctors removed a portion of her lung in an unsuccessful attempt to combat the aggressive disease

Camille Gaubert, Pourquoi l'OMS qualifie les cigarettes lectroniques d' incontestablement nocives , Sciences et Avenir ,

Furthermore, we explored the origin of heterogeneity by restricting the analysis to subgroups of studies defined by study characteristics such as study design, type of exposure (active or passive smoking), and age of the participants (children/adolescents or adults)

That decision proved pivotal