Validating the SIR:: a better prognostic score index for patients with brain metastases treated with stereotactic radiosurgery - Weltman, Eduardo; Brandt, Reynaldo André; Hanriot, Rodrigo de Morais; Luz, Fábio Prado; Chen, Michael Jenwei; Cruz, José Carlos; Wajsbrot, Dalia Ballas; Nadalin, Wladimir (Einstein, 2007)