Again, it would be nice to say that there have been well-designed studies that demonstrate this, but to date, there have not. If you just think about an e-cigarette for a minute, it has a liquid in it. The liquid has varying constituents. Some have nicotine in them. Some have nicotine in varying concentrations. They have coils that heat this liquid up. Various manufactured products will deliver different amounts. It depends on the individual, how frequently they're puffing, how much they're drawing in, and other things that come in with it. It's not a straightforward matter—
On October 21st, 2014. See this statement in context.