Fig. 3From: Efficacy and safety of HER2 inhibitors in combination with or without pertuzumab for HER2-positive breast cancer: a systematic review and meta-analysisForest plots of PFS and OS: combination of pertuzumab with HER2 inhibitors versus HER2-targeted therapies without pertuzumab for patients with HER2+ breast cancer. PFS = progression free survival, OS = overall survival, HER2 = human epidermal growth factor receptor 2, HR = hazard ratioBack to article page