Rest assured, long-term studies are indeed underway. The biggest limiting factor in these studies is time itself.

I have been told to make it very clear that any views I have or will express in this thread should be taken as information expressed on a peer-peer level. If you are considering any herbal, medicinal, or other changes to your current treatment you should first consult your health care provider. So I can answer any questions you want to ask about this study but do not consider it my professional advice. (I asked our chief about any policies concerning the release of information from this study and the almost hit the fan; lawsuit abuse is such a great thing.)