3:00 PM. 299. An oxygenated biohybrid device for the long-term delivery of checkpoint and cytokine therapies.Jake Schladenhauffen1, Cody Fell1, Anthony Davis1, Grace May1, Shalini Pandey, PhD1, Abhijith Surendran, PhD2, Inkyu Lee3, Peter Rios, PhD4, Daisy Lopez4, José Oberholzer, MD4, Tzahi Cohen-Karni, PhD3, Jonathan Rivnay, PhD2, Omid Veiseh, PhD1 1Rice University, 2Northwestern University, 3Carnegie Mellon University, 4CellTrans, Inc