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Frequencies of metastasis locations in 166 patients with metastatic breast cancer of the present cohort study according to molecular subtype. Frequencies of different metastatic sites in patients with breast cancer with involvement of (A) one, (B) two, (C) three and (D) four metastatic sites by each breast cancer subtype. DLN, distant lymph node; HR, hormone receptor; HER2, human epidermal growth factor receptor 2.
