P1311: LONG-TERM SAFETY AND EFFICACY OF EXTRACORPOREAL PHOTOPHERESIS AS EARLY SECOND-LINE TREATMENT FOR PATIENTS WITH STEROID-DEPENDENT OR REFRACTORY ACUTE GRAFT-VERSUS-HOST DISEASE.Eleni Gavriilaki, Ioanna Sakellari, Eleni Papchianou et al.|HemaSphere|2023Cited by 0