Actually, we have far more profound and long-reaching evidence, as released about a week ago out of the International Journal of Drug Policy. This shows us, actually, qualitatively and quantitatively on about 3,500 people out of the UK who've been followed up over a process of the last three years, that actually not only does it change potentially harmful behaviour at the point of that potential harmful behaviour, but it has flow-on effects. Two-thirds of people in this study had changed their behaviour permanently because of the interaction that they had had with a drug-checking service, which in turn meant that they were less likely to engage in harmful behaviour. 