Whoa, that's really cool! A few kilos? How much does a heart weigh? Surely not that much . . . I don't know if I'll be kept up to date on this one, but the reason I'm interested in participating is that I've been using e-cigarettes and I really hope that they can help improve the lives of smokers. The thing is, they're so new that there has been no chance for long-term studies, something which big tobacco has latched on to and is using to whip the FDA and some sectors of the public into a fear frenzy. I hope that by participating, we'll all be able to get a clearer picture of e-cigs and how nicotine might be more safely consumed by those who are addicted to it. Anyway, as a person who has done more than one, would you encourage others to participate in medical studies too?