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a link with cancer and heart disease

For smokers looking to quit, vaping might be a stepping stone, but its not a harmless one

Smokers also developed cardiovascular disease up to five years earlier than nonsmokers, which led to a significantly shorter lifespan, the research showed

An empirical analysis of cigarette addiction
Dietland Muller-Schwarze, 2003, page 43 (book at Google Books) Stereoselective synthesis of enantiomerically pure nupharamine alkaloids from castoreum