Validation of the Breast Cancer-specific Graded Prognostic Assessment (GPA) for Patients With Breast Cancer With Brain Metastases - Kalakota, K.; Helenowski, I.; Schumacher, A.; Marymont, M.H.; Gradishar, W.; Chandler, J.; Raizer, J.; Grimm, S.A.; Sperduto, P.W.; Mehta, M.P. (International Journal of Radiation Oncology, Biology, Physics, 2012)