Sorry guys, but it does affect also those of us only cramped up in a B737. It all depends where you are in the world, the further close to the poles, the worse it gets. And the radiation differs a lot from day to day. As you all know itis a JAR requirement to keep tabs on the radiation for all crew members, but it seems most airlines have "forgotten" about it.
I have heard of a company that can exactly monitor radiation, not based on statistics, but on actual data. I will come back when I have done a little more "fishing".