I found the framework very informative but do not work with nanoparticles and do not understand a lot of it. My reason for taking the course was to get an overall understanding of what is needed to evaluate exposures. I now have the big picture but will need to study the slides very deeply on my own. The slides were very good. I'm sorry that I don't have any specifics to share. Thanks for the presentation because for me, it's a good start.