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In fact, a 2010 meta-study by two researchers from Ohio State University concluded that while menthol cigarettes aren't more harmful than regular smokes, the menthol flavoring often makes it harder for smokers to quit

Tucker and William G

Warning labels on cigarette packages could soon be more graphic, warning that Smoking reduces blood flow to the limbs, which can require amputation, and Smoking causes bladder cancer, which can lead to bloody urine. The US Food and Drug Administration on Thursday issued a proposed rule that requires tobacco companies to place new graphic health warnings on cigarette packages and in advertisements

Other research groups have reconsidered and modified parameters as well (Baker 2002)

It can be done by DIY, but it might require tools and some basic wiring experience