I remember looking into this when I was a college student. You normally have to fit a certain set of parameters for age, gender, any medical conditions, whether or not you smoke, etc. I was considering it, but once I got to know Paul, he convinced me he would rather I not be a medical guinea pig, as you never know what side effects some of these things might have!

So I never did one, but I know that my brain tumor*, at least, was not a result of something I volunteered for!


*Don't worry, it was benign, an acoustic neuroma, removed years ago and nothing since ...