Combination Therapy of Pyrotinib and Metronomic Vinorelbine in HER2+ Advanced Breast Cancer after Trastuzumab Failure (PROVE): A Prospective Phase 2 Study. - Hao, Chunfang; Wang, Xu; Shi, Yehui; Tong, Zhongsheng; Li, Shufen; Liu, Xiaodong; Zhang, Lan; Zhang, Jie; Meng, Wenjing; Zhang, Li (Cancer Research & Treatment, 2025)