TY - Journal of International Oncology A1 - Guan Xiuwen, Ma Fei, Xu Binghe T1 - The landscape of palliative systemic therapy and overall survival analysis of elderly patients with advanced breast cancer in China National Cancer Center Y1 - 2019-11-08 JF - Journal of International Oncology JO - Journal of International Oncology SP - 657 EP - 661 VL - 46 IS - 11 UR - https://gjzlx.sdfmu.edu.cn N1 - 10.3760/cma.j.issn.1673-422X.2019.11.003 ER -