PB1758: TWENTY-ONE YEARS' EXPERIENCE OF THE EORTC 58951 PROTOCOL FOR THE TREATMENT OF CHILDHOOD ACUTE LYMPHOBLASTIC LEUKEMIA IN THE SOUTH OF TUNISIA. (23rd June 2022) - Frikha, I.; Siala, N.; Turki, I.; Mdhaffar, M.; Ben Amor, I.; Charfi, M.; Louati, N.; Fakhfakh, Y.; Kallel, F.; Khalifa, L.; Kassar, O.; Hadijji, S.; et al.