P1339: CLINICAL OUTCOMES OF PATIENTS WITH EBV+ PTLD FOLLOWING HEMATOPOIETIC STEM CELL TRANSPLANTATION WHO FAIL RITUXIMAB: A MULTINATIONAL, RETROSPECTIVE CHART REVIEW STUDY. (23rd June 2022) - Sanz-Caballer, J.; Storek, J.; Socié, G.; Thirumalai, D.; Guzman-Beccera, N.; Xun, P.; Kumar, D.; Sadetsky, N.; Dierickx, D.; Reitan, J.; Barlev, A.; Mohty, M.