I would echo the sentiment that we're probably not in a world where we're trying to reinvent the wheel. I would say, though, that we have to be cautious not to be afraid of some failure. You can turn that around and become overly cautious because you're afraid to fail.
I think if you look at our industry, there are a number of tries that just didn't work, but that research went on to become something else spectacular. If you take it at face value and say, we don't want to go down that path because somebody already looked at it, I think we run the risk of missing out on something. The world changes so quickly that there are opportunities out there we could miss if we're not a little more open to trying new things and taking a second look at some therapies.
I'll give you one concrete example. AZT was a drug that was developed for cancer and did not really perform up to expectations. The new wheel, if you will, ended up being one of the most successful drugs for AIDS and HIV, and it's the AZT drug. That was somebody who came back at that one with a fresh approach, a fresh look, and that's research and innovation at its best.