Bavituximab Withdrawn Phase 2 Trials for Triple-Negative Breast Cancer (TNBC) / Triple Negative Breast Cancer (TNBC) / Triple-Negative Breast Neoplasms / Cancer, Breast / ER-Negative PR-Negative HER2-Negative Breast Cancer / ER-Negative PR-Negative HER2-Negative Breast Neoplasms / Triple Negative Breast Neoplasms Treatment