1. Department of Pediatrics, Hematopoietic Stem Cell Transplantation and Cellular Therapy Unit, Hospital Infantil Universitario “Niño Jesus”, Madrid, Spain
2. Division of Hematology, Blood Bank and Graft Manipulation Unit, Hospital Infantil Universitario “Niño Jesus”, Madrid, Spain
3. Oncology/Hematology Lab, Hospital Infantil Universitario “Niño Jesus”, Madrid, Spain
4. Histocompatibility Lab, Community Transfusion Center of Madrid, Madrid, Spain