SORAFENIB (SOR) PLUS CHEMOTHERAPY (CRX) IN PATIENTS (PTS) WITH TRIPLE-NEGATIVE (TN) ADVANCED (ADV) BREAST CANCER (BC): SUBGROUP ANALYSES OF 3, DOUBLE-BLIND, RANDOMISED, PLACEBO (PL)-CONTROLLED PHASE 2B TRIALS FROM THE TIES (TRIALS TO INVESTIGATE THE EFFICACY OF SORAFENIB) BC PROGRAM