1. Pediatric Surgery Department La Paz University Hospital Madrid Spain
2. Idipaz Institute La Paz University Hospital Madrid Spain
3. TransplantChild ERN Idipaz Institute La Paz University Hospital Madrid Spain
4. Institute for Immunological and Physiopathological Studies (IIFP‐CONICET‐UNLP) National University of La Plata Buenos Aires Argentina
5. Immunology Department 12 de Octubre University Hospital Madrid Spain
6. Pediatric Surgery Department EOC TransplantChild ERN La Paz University Hospital Madrid Spain
7. imas12 Research Institute 12 de Octubre University Hospital Madrid Spain
8. Experimental Transplant Department Alfonso X University Madrid Spain
9. Health Research Institute Fundación Jimenez Diaz Madrid Spain
10. Histology and Pathology Department Rey Juan Carlos University Alcorcon, Madrid Spain
11. Research Institute, Idipaz Institute La Paz University Hospital Madrid Spain
12. Immunohistochemistry Department Idipaz Institute La Paz University Hospital Madrid Spain
13. Pathology Department La Paz University Hospital Madrid Spain