Anna Sureda, MD, PhD, Catalan Institute of Oncology, Duran I Reynals Hospital, Barcelona, Spain, discusses the relationship between the EBMT registry and the HARMONY Alliance. The HARMONY Alliance is a multi-stakeholder platform which collects big data on hematological malignancies. The EBMT registry holds data on patients who have undergone transplantation. This interview took place during the 47th Annual Meeting of the European Group for Blood and Marrow Transplantation (EBMT) 2021.