My point is that the weakness of the meta-studies is that they allow the poorly conducted studies to affect the results (hence why you have meta studies showing efficacy of acupuncture treatments on all kinds of illnesses. But if you only consider the well thought out, double blinded studies then the effect goes away).
Instead one should look at the methodology of the studies and select the ones that are the best. Granted one could do a meta study of just those, the very best, studies. But like I said in my previous post, most scientists seem to prefer large amounts of data over correct data.
And once again I know next to nothing about the studies you are refering to so there is no reason to make any links. I am merely debating the merit of meta-studies.