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"It is not that those with reduced global brain volume tend to smoke from a genetic standpoint, but it is that those who smoke cause their brains to atrophy," he said

And in the United States, the number of those stricken with a severe lung illness tied to vaping has topped 2,100, and more than 40 people have died from vaping-related illness, according to the U.S

Betty, 50, Swansea: My alcoholic dad gave up drinking Never smoked My dad was an alcoholic who had a partner who smokes 60 cigarettes a day

They also found the odds of CVD gradually increased with increasing frequency of e-cigarette exposure in current tobacco cigarette smokers

The reasons behind this apparent contradiction are not fully understood and require further research

Cancer Epidemiol Biomarkers Prev