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Philip Morris International plans to enter the electronic cigarette business, a $2 billion-plus global market identified by the maker of Marlboro cigarettes as its "greatest growth opportunity." Speaking to investors in New York, Philip Morris Chief Executive Andre Calantzopoulos said the company would enter the e-cigarette business in the second half of 2014 to tap fast-growing demand for a less harmful alternative to cigarettes

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In the analyses, age and sex adjusted p-values with respect to the SLT habit status were tabulated using one-tailed two-sample t-test