That's a great and very timely question. A lot of the research being done now is really trying to distinguish between mild traumatic brain injury and post-traumatic stress disorder, because the symptoms people display are often very similar. Some of the higher-technology research going on and the really cutting-edge stuff is around brain mapping, which is looking at the physical changes in the brain, to see if you can distinguish between post-traumatic stress disorder and mild traumatic brain injury. But it's also brain biomarkers, so actually measuring the chemicals in the brain to see if there are different chemical changes, because there are changes in the brain with both. It's being able to distinguish them.
As I'm sure you can appreciate when it comes to a clinical level, if you make the incorrect diagnosis and you are treating for post-traumatic stress disorder and the person has a mild traumatic brain injury, they are never going to get better. So it's really critical.
I think those are the really cutting-edge things being done. We have some sensational researchers in Canada doing work, looking at eye movement, which is very closely related, obviously, to brain function—all our movements are, but the eye is in particular—and seeing if they can distinguish between different eye movements to determine it, so it's not as invasive as doing brain biomarkers and brain mapping.