Gateway. Negative correlation found between vape use & quitting where e-cig resembles actual cig. So guess what: they all resemble cigs.
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Professor Chung should publish 'study' so that ethical & competent researchers can show why it's flawed. http://www.ecigarette-research.org/research/index.php/whats-new/whatsnew-2015/238-h-k …pic.twitter.com/UhCX3UWTtC
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