Our long term collaboration developing open-source software had the latest iteration of the system published in PLOS Computational Biology. Yogi Patel is the lead author. This is in collaboration with the labs of Dave Christini at Weill Medical College of Cornell University, Chuck Dorval at University of Utah, and John White at Boston University.
Y. A. Patel, A. George, A. Dorval, J. White, D. Christini, and R. J. Butera. “Hard real-time closed-loop electrophysiology with the Real-Time eXperiment Interface (RTXI).” (2017) PLOS Computational Biology. 13(5):e1005430. PMC5469488