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Preferred reporting items for systematic reviews and meta-analyses: the PRISMA statement

No fit-testing of respirators, as mandated by OSHA standard (29 CFR Part 1910) 56 , was performed, with the intent of obtaining representative particle emission rates for untrained individuals without access to professional fitting assistance

[1] Manufacture [edit] Cigarette filters are usually made from plastic cellulose acetate fibre, [3] but sometimes also from paper [16] or activated charcoal (either as a cavity filter or embedded into the cellulose acetate)

Initial evidence suggests this may be a safer alternative to traditional cigarettes and may help to treat addictive behaviors