Patienter egnede til inklusion havde lokalt fremskreden eller metastatisk brystcancer med overekspression af ErbB2 - (HER2 -), progredierende efter tidligere behandling, der inkluderede taxan, antracyklin og trastuzumab.
Patients eligible for enrolment had ErbB2 (HER2)-over-expressing, locally advanced or metastatic breast cancer, progressing after prior treatment that included taxanes, anthracyclines and trastuzumab.