P337: LONG TERM INFECTION-DRIVES CHANGES IN THE BONE MARROW MICRO-ENVIRONMENT OF PAX5+/- MICE PREDISPOSED TO B CELL PRECURSOR ACUTE LYMPHOBLASTIC LEUKEMIA. (23rd June 2022) - Liu, W.; Stencel, O.; Lu, Z.; Xu, C.; Lang, P.; Auer, F.; Hauer, J.; Fischer, U.; Borkhardt, A.; Pandyra, A.