https://www.cochrane.org/fr/CD011406/CHILDCA_chimiotherapie-haute-dose-et-autogreffe-de-cellules-souches-hematopoietiques-chez-les-enfants-les 2021 United Kingdom review of literature french abstract chemotherapy colony-forming unit, nos adulthood Adult young adult Ewing sarcoma autografts Child chemotherapy, nos adult children adolescence adolescent sarcoma, ewing Child Chemotherapy Child Adolescent child Child Cell Adult transplantation, autologous Adolescent child, nos hematopoietic stem cells ewing's sarcoma recurrence