Dr. Antonio Pérez-Martínez, is the Head of the Paediatric Haemato-Oncology Service at the University Hospital La Paz, Madrid, Professor and Chief of the Department of Paediatrics at the Faculty of Medicine of the University Autonoma of Madrid (UAM) and Principal Investigator of the Translational Research Group in Childhood Cancer, Haematopoietic Transplantation and Cell Therapy of the Health Research Institute of La Paz Hospital (IdiPAZ). He is responsible for the Clinical Research Unit in Child Oncohematology accredited by the consortium European Innovative Therapies for Children with Cancer (ITCC-). He is Chair of subcommittee COST4KIDS (Combined solid transplant and hematopoiteic stem cell transplant) the Paediatric Disease Working Party (PDWP) of the European Society for Blood and Marrow Transplantation (EBMT).