Hi I really like the ideas in entry #13 because it makes me think of partnership. The way you have evoked a sense of a person on the inside by putting two different colors together (like two different labs) is really interesting. And the smooth lines make me think of operational integration and smoothness. Nice work. I also like the inclusion of the tagline in the logo concept itself. Very interesting.
I'm still interested in seeing some designs with "Diagnostics" instead of "Dx". That provides some distance from ResearchDx while the colors keep some continuity. We are trying to walk a fine line there and it is hard to know where the balance will land.
Another thought -- I also like that you have introduced another color into the color palette -- gray. We will need to think about how we translate the logo to other graphical elements on our website, printed materials, etc, and still keep some distance from ResearchDx. Introducing some other colors is one option.