P837: ELTROMBOPAG (EPAG) INDUCES HEMATOLOGIC RESPONSES FOR PATIENTS WITH POST-ALLOGENIC HEMATOPOIETIC STEM CELL TRANSPLANT POOR GRAFT FUNCTION (POST-ALLO HSCT PGF): RESULTS OF THE ELTION STUDY IN SPAIN. (23rd June 2022) - Vallejo, C.; García, I.; Sanchez Guijo, F.; Cuesta, M.; Solano, C.; Sampol, A.; Torrado, T.; Vendranas, M.; Marigil, M.