376 Overcoming tumor heterogeneity – Clinical trial assays to prospectively assign patients customized multiplexed TCR-T cell therapy in Phase 1 by Yun Wang, Henry Tsai, Sam Harris, Andrew Nguyen, Ribhu Nayar, Sonal Jangalwe, Alexander Cristofaro, Nancy Nabilsi, Gavin MacBeath, Debora Barton, Ariane Lozac’hmeur, Qidi Yang, Teagan Parsons, Shazad A Khokhar, Sveta Padmanabhan, Antoine J Boudot, Livio Dukaj, Cagan Gurer, Jeffrey Coleman, Adam Hsiung, Chunghun Chang, Shehla Arain, Jessica Rathbun, Ruey Pham, Shardul Soni, Tyler Danek, Katie Marshall, Amanda Jensen, Chris Riley, Erica Buonomo, Shrikanta Chattopadhyay