P1329: POST-TRANSPLANT CYCLOPHOSPHAMIDE (PT-CY) VERSUS ANTITHYMOCYTE GLOBULIN (ATG) AS GVHD PROPHYLAXIS FOR MATCHED UNRELATED HEMATOPOIETIC STEM CELL TRANSPLANTATION. (23rd June 2022) - Dachy, F.; Furst, S.; Calmels, B.; Pagliardini, T.; Harbi, S.; Bouchacourt, B.; Calleja, A.; Lemarie, C.; Collignon, A.; Morel, G.; Legrand, F.; Bekrieva, E.; et al.