HEALTHCARE RESOURCE UTILIZATION IN PATIENTS WITH RELAPSED OR REFRACTORY ACUTE LYMPHOBLASTIC LEUKEMIA USING REAL‐WORLD DATA FROM FIVE COUNTRIES. (17th June 2021) - Cool, C.; Feng, C.; Wade, S.; Rau, R.; Ching, K.; Nyamutswa, L.; Viswanathan, H.; Kharabi, B.; Duvall, A.