That's a great question. There are a couple of ways I'd like to address that.
One, when we're designing research studies, we recruit based on the study we're doing. That's going to have certain inclusion criteria depending on the topic of study. We do clinical research. We also do applied research, which could be qualitative and more about interviews, for example.
For the people on whom we are conducting research or who would be implicated in that research—the “subjects” of the research, for lack of a better word—we would have the criteria we need. We use all sorts of strategies to get the word out to reach veterans and families that fit the profile so we can get the samples we need to have a study that gives us robust enough evidence to speak to.