What sites for SBRT are thought to be more immunogenic for antigen presentation when combined with immunotherapy?

I am aware of only one prospective trial structured to approach this question to some extent. It was from Jim Welsh's team at MDAH and was presented at ASTRO this year.

http://www.redjournal.org/article/S0360-3016(17)33877-4/abstract

There was a hint that sequential ipilimumab followed by RT to lung l...