A clinical comparison of schizophrenia with and without pre-onset cannabis use disorder: a retrospective cohort study using categorical and dimensional approaches

http://theroc.us/researchlibrary/A%20clinical%20comparison%20of%20schizophrenia%20with%20and%20without%20pre-onset%20cannabis%20use%20disorder-%20a%20retrospective%20cohort%20study%20using%20categorical%20and%20dimensional%20approaches.pdf