They are not there, because they're aren't any.
There are persons in the robotic surgery community that do have criss-crossing histories to be sure. These coincidences mentioned here all the time have resulted in NOTHING concrete, at all. The only rumors are on this board, and I find it telling that the market NEVER picks up on any.
Hargrove, Fowler, and Rayman sure seemed to be tending towards isolation in the past couple years, rather than cooperation with other entities.
Don't get me wrong, I want Titan to get bought out, because they are friendless it would appear.