Statistics from Altmetric.com
If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.
Cigarette smoke contains 72 carcinogens with ‘sufficient evidence for carcinogenicity’ in either laboratory animals or humans.1 2 The amounts of these carcinogens are almost universally expressed as nanograms or micrograms per cigarette, thus conveying the image of very small quantities (one-billionth or one-millionth of a gram, respectively, where 1 g is 1/454th …
Competing interests None.
Provenance and peer review Not commissioned; externally peer reviewed.