http://www.health.harvard.edu/newsle...d-young-people
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC558687/
http://online.liebertpub.com/doi/abs.../cpb.2006.9956
None of those are reputable I assume..... the last one has quite a few cross references as well.
It's been done, redone and redone on the redo. And Lieberman has been at it for decades. Anyhoo, keep the brain AIDS in the discussion forum, where they belong.