Overview MTX and Steroid for III-IV aGVHD Treatment Status: Recruiting Trial end date: 2022-09-30 Target enrollment: Participant gender: Summary The aim of the study is to identify the efficacy and safety of methotrexate (MTX) combined corticosteroid treatment for grade III-IV acute graft-versus-host disease (aGVHD) after allogeneic hematopoietic stem cell transplantation (allo-HSCT). Phase: Phase 2 Details Lead Sponsor: Peking University People's HospitalTreatments: Methotrexate