Wow, that's interesting. I know some people like to argue that the psychology focused doctors take control of the research for some conditions. I think with tinnitus it is very clear that with it being rooted in the brain there is a large psychological element both in its maintenance – for some people – and in how people cope with it. From the limited amount I have read it sounds like there is a dearth of biological research into the actual mechanism of tinnitus generation in the brain, and against that kind of background I suppose medication trials will often fail and I wonder if that has led to the focus on CBT.