Prognostic factors in non-metastatic Ewing's sarcoma tumor of bone: an analysis of 579 patients treated at a single institution with adjuvant or neoadjuvant chemotherapy between 1972 and 1998 - Bacci, G; Longhi, A; Ferrari, S; Mercuri, M; Versari, M; Bertoni, F (Acta Oncol, 2006)