One of the questions I would have—and I'll relate to one of my family members who's a smoker, my lovely son, who has taken up e-cigarettes—is this. He will smoke e-cigarettes at home. He's part of our military family so when he goes on an exercise and he can't plug the e-cigarette in to recharge it, he goes and buys a pack of cigarettes because he can't still do without the nicotine. So my question to both you, Dr. Britton and Dr. Peruga, is this.
Aren't we just really substituting one for another? It seems to me from firsthand knowledge that I can see that we may be just substituting one for another. I understand the benefits. I can see potential benefits there. But how do we stop those people, for lack of a better word, from being dually addicted to two different substances? How do you stop that?
I'll start with you, Dr. Peruga, and then go to Dr. Britton.