NCT02422199 2018-07-09A Study of Pyrotinib Plus Capecitabine Versus Lapatinib Plus Capecitabine in Patients With HER2+Metastatic Breast Cancer Who Have Prior Received Anthracyclin, Taxane or TrastuzumabJiangsu HengRui Medicine Co., Ltd.Phase 1/2 Unknown128 enrolled