Capecitabine and bevacizumab with or without vinorelbine in first-line treatment of HER2/neu-negative metastatic or locally advanced breast cancer: final efficacy and safety data of the randomised, open-label superiority phase 3 CARIN trial - Welt, A; Marschner, N; Lerchenmueller, C (Breast Cancer Res Treat, 2016)