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6 Claude Teague, a scientist working on filters for the tobacco company RJ Reynolds, found that changing the pH of filters led these to discolour after smoking, thus creating the misleading impression that filters removed toxins and thus rendered smoking safe
Reynolds, which had experimented with nicotines chemistry in the 1980s to create a smoother light cigarette with less tar, Xing said
Here at Shades were trying something new quick summaries from different points of view
Thus, a total of 200 persons were needed in the present study
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