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