Fig. 1From: Association between progression-free survival and overall survival in women receiving first-line treatment for metastatic breast cancer: evidence from the ESME real-world databaseStudy flow chartESME, epidemiological strategy and medical economics; mBC, metastatic breast cancer; HR + , presence of hormone receptor; HR − , absence of hormone receptor; HER2 + , human epidermal growth factor receptor 2 (HER2) protein overexpression; HER2 − , no HER2 protein overexpression. TN, triple negativeBack to article page