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humanodon  ·  3746 days ago  ·  link  ·    ·  parent  ·  post: Have any of you participated in a medical study?

I'm told they want to compare the effects of vapor on the airways of e-cig users to the effects of smoke on the airways of cigarette smokers. At this point, I don't know who the people are conducting the study, but other than asking for credentials and looking them up, what else might I do?