Trastuzumab Not Yet Recruiting Phase 3 Trials for Stage IV Breast Cancer / Stage IIIA Breast Cancer AJCC v7 / Recurrent Breast Carcinoma / Stage IIIB Breast Cancer AJCC v7 / HER2/Neu Positive / Stage III Breast Cancer AJCC V7 / Stage IIIC Breast Cancer AJCC v7 / Stage IV Breast Cancer AJCC v6 and v7 / Breast Adenocarcinoma Treatment