The authors assessed 1) the overall risk of death among cannabis users compared with nonusers and the extent to which psychosis affects excess mortality; 2) mortality among persons with psychotic disorders and the extent to which cannabis use affects excess mortality; and 3) the interaction effect of cannabis use and diagnosis of psychotic disorders on mortality. Login at top right hand side of page using your SSSFT NHS Athens for full text. SSOTP - request a copy of the article from the library http://bit.ly/1Xyazai