Thanks. Very insightful and thought provoking. Like I said, low dose exposure hadn't been studied well. This is "cutting edge" stuff, and I'm sure more will come out.

One word of caution, however, is that epidemiology is very difficult. By that I mean that it is hard to isolate causative agents without effecting other variable. This is not to say that they are wrong, they help narrow the search considerably...but we are in the begining phase, really, of these studies. Initial results will have to be independantly confirmed and actual pathways of identified.

It is a scary picture that is emerging, though. (note the conflicting info in my above post)