P306: PAX5 DEFICIENCY AND GERMLINE SUSCEPTIBILITY TO PEDIATRIC LEUKEMIA. (23rd June 2022) - Auer, F.; Escudero, A.; Sipola, M.; Viitasalo, A.; Morcos, M.; Friedrich, U. A.; Pandyra, A.; Borkhardt, A.; Takagi, M.; Hauer, J.