Well, there's lots of stuff on the market. Unfortunately, the evidence is not there to support their use. Again, I think what we've seen is that people tend to adjust differently if they have difficulty, as you mentioned, with range of motion and turning sometimes. They become more adept at looking in their mirrors in a different way to kind of cover the blind spot or some other difficulty they have. So there's a lot of adjustment taking place.
I think we shouldn't worry too much about the marketing of all those products, whether they're tools for the car or...we even hear about these brain-training products, because there's little evidence for all those things in terms of what they do. I think we have to be cautious about making sure we have evidence before we recommend those products.