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Characteristics of patients at initiation of trastuzumab treatment
aDefined as time from breast cancer diagnosis to metastatic disease.
bLiver and/or lung and/or CNS.
Abbreviations: CNS, central nervous system; ER, estrogen receptor; HER-2, human epidermal growth factor receptor 2; IHC, immunohistochemistry; NA, not available; PgR, progesterone receptor.
