Mounting? That's been known far longer than 2011. ANY psychoactive substance (even CAFFEINE) can cause the ONSET of psychosis IE if you are predisposed to psychosis anyway it can bring it out earlier.
If your family has a history of psychosis you shouldn't be using ANY pschoactives at all. ANY. Not just pot.

Your lung study is disproven too.

http://www.ncbi.nlm.nih.gov/pubmed/23802821