...Women with age not less than 18 years,Documented metastatic breast cancer previously untreated by chemotherapy,HER2 negative (assessed by 0-1 + IHC or 2+ IHC with FISH-) on the primary tumor or on metastatic site, At least one measurable lesion using the RECIST criteria, Karnofsky Performance Status not less than 70%,Life expectancy not less than 16 weeks, Adequate bone marrow, hepatic and renal functions....