For a while now there’s been consensus that there is a correlation between cannabis use and psychosis; those people who have smoked cannabis were also statistically more at risk of psychosis. Whether cannabis caused the psychosis, or whether it was just that people at risk of psychosis were more likely to use cannabis, no-one really knew. And so this study is interesting because it suggests strongly that it’s more than a link, that cannabis may well cause psychosis. Now, it is one study and it is early days, and I’m not medical or statistical enough to tell you how rigorous that study is, but it is interesting. It’s also the first of a few studies into it. So maybe in the next few years we’ll know for certain.