Certainly NPDUIS, we believe, is a huge step forward. It will be a massive database, much better and bigger than everything we've ever had. We think it will allow us to track patterns that we've never been able to track before, because in some cases we may be able to link those to hospitalization, for example. We have other data sets. I've been asked to speak about the pharmaceutical ones, but we do have other data sets as well.
But you're absolutely right: there are some limitations to what you can do, even with these very large data sets.