narmac, you would have to agree that (as a comparison) BTI is no less speculative than RVX and Zenith. But you still fall in much favour of BTI, correct?

Of the three I see Zenith stands a much better chance of making money for investors. Clinical Trials are being conducted in collaboration with BP, at little to no cost to Zenith. BTI seems to be doing a little bit of that as well. 

Just saying ... Koo