8:00 AM. 397. Engineered Immune Organoid–on–Chip Platform Reveals Chemokine Receptor Dysregulation Impairs Germinal Center Organization in Lymphoma Patients.Manuel Quiñones-Pérez1, Zhe Zhong1, Jean Koff2, Ankur Singh1 1Georgia Institute of Technology, 2Emory School of Medicine, Emory University