I'm not certain this paper I'm referencing is the same one referenced in this thread's article, but the doctor was a collaborator on this: 44 healthy controls,

I'm not certain this paper I'm referencing is the same one referenced in this thread's article, but the doctor was a collaborator on this: 44 healthy controls, 10 subjects with a CUD history, 28 schizophrenia subjects with no history of substance use disorders, and 15 schizophrenia subjects with a CUD history http://schizophreniabulletin.oxfordjournals.org/content/40/2/287 http://schizophreniabulletin.oxfordjournals.org/content/40/2... I'm no scientist, but it seems a little presumptuous to me to say I've come to a general conclusion about anything when all I have to investigate are 25 people. To quote the above "10 subjects with a CUD (Cannabis Use Disorder) history,... and 15 schizophrenia subjects with a CUD history".