The commentaries by the two former tobacco industry consultants, university professors at a major midwestern medical school, are not in any way pro-tobacco, although they do criticize a number of current anti-smoking initiatives because they are ineffective and not based on sound formative research.

These data cast further doubt on the statements made by CDC officials and a number of tobacco control researchers, who have publicly concluded that e-cigarettes are a gateway to smoking.

The purpose of the experiment was to determine whether manipulation of an individual's Facebook news feed by blocking either positive or negative emotional content could affect the mood and emotional expression of that person. In short, the experiment sought to determine whether emotion is "contagious."

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