The problem Philip Morris had with electronic cigarettes since the beginning of development was the satisfaction of the smoker. Because the taste is dramatically different and, at the initial stages, the nicotine pharmacokinetics were very slow. You could not get the satisfaction. It's not so easy to crack this code. The taste satisfaction is very important. The closest you are to this, the more chances you have to switch people. It's very nice to have a zero-risk product, but if nobody uses it, you don't have any reduction in public health risk.