That's a very interesting question; thank you for it.
In fact, I wanted to describe what we're doing in the field and to talk about the challenges we're facing, but I definitely didn't want to give the impression that the challenges are minor. There are definitely some very important questions that have to be answered, and I think we're preparing to attack them.
I believe we've already talked a little about post-traumatic stress syndrome. We're doing research in that area. Do we have any potential solutions? I don't know exactly. Linda may want to talk about that a little more. That's a good question.
I talked about mental health in my speech; that's definitely a very important question for seniors. I also talked about the percentage of people suffering from Alzheimer's disease. These are definitely major challenges.