Welcome to the Forum TerryS. You can search for previously discussed topics by clicking on the 3 vertical dots to the right of your name and then typing in a key word into the search box (like Radon). I found 2 other posts that discussed Radon but not the science that you are seeking. If you haven't discovered it yet, may I encourage you to review our Primer, written by Stavia (a physician member). The Primer can be found under the Getting Started tab or here: viewtopic.php?f=33&t=1418
. Another great resource to check out is New here? Some Best Practices contributed by Ski. It can be found under the Our Stories tab or viewtopic.php?f=2&t=557
Again, welcome. I look forward to reading your posts and great questions.