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