trastuzumab based treatment
trastuzumab plus endocrine therapy trastuzumab plus epirubicin and cyclophosphamide followed by docetaxel
es-BC - HER2 negative - (neo)adjuvant (NA) 1
es-BC - HER2 positive - (neo)adjuvant (NA) 4   
la/mBC - HER2 positive
la/mBC - HER2 positive - (neo)adjuvant (NA)
la/mBC - HER2 positive - 1st Line (L1) 5   
la/mBC - HER2 positive - 2nd Line (L2) 13
Comparator:  vs lapatinib plus epirubicin and cyclophosphamide followed by docetaxel;   vs trastuzumab plus chemotherapy; 
Risk of bias:  low;   some concerns;   high;  NA;