Well it looks like we know who the third player is in the DARPA contract. A simple web search for Lawrence, Mass. produced this company.
NxStage Medical, Inc.
Which JJ has mention in past presentations as part of companies that represent the dialysis industry.
As per this post from andy55q
Battelle Memorial Institute, Columbus, Ohio was awarded a $7,057,206 cost-plus-fixed-fee contract modification (HR0011-13-C-0023). This work is for the Dialysis-Like Therapeutics program (DLT). DLT seeks to develop a portable device that can effectively treat sepsis across the military health system; capable of removing dirty blood from the body, separate harmful agents, and return clean blood to the body in a manner similar to dialysis treatment of kidney failure. Work will be performed in Columbus, Ohio (51 percent); San Diego, Calif., (7 percent) and ***Lawrence, Mass.*** The estimated completion date is Feb. 12, 2018. The Defense Advanced Research Projects Agency, Arlington, Va., is the contracting activity