Prognostic factors and survival in patients under 18 years of age with Ewing sarcoma family tumors: a 10-year experience by Ligia RiosOncología Pediátrica y del Adolescente; Hospital Nacional Edgardo Rebagliati Martins. Lima, Perú, Liliana Vásquez, José María Silva, Luis Sialer, Iván Maza, Mónica Oscanoa, Gloria Paredes, Jenny Gerónimo

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