- Predictive factors of histologic response to primary chemotherapy in patients with Ewing sarcoma. Ferrari, S., Bertoni, F., Palmerini, E., Errani, C., Bacchini, P., Pignotti, E., Mercuri, M., Longhi, A., Cesari, M., Picci, P. J. Pediatr. Hematol. Oncol. (2007)