pembrolizumab based treatment
pembrolizumab plus paclitxel followed by doxorubicin plus cyclophosphamide
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 paclitaxel followed by doxorubicin plus cyclophosphamide; 
Risk of bias:  low;   some concerns;   high;  NA;