palbociclib plus letrozoletitlepalbociclib plus endocrine therapytitleendocrine therapytitleletrozoletitlePENELOPE-B, 2021 NCT01864746 la/mBC - HR-positive - 1st line (L1) 628/616PALOMA-1, 2016 NCT00721409 la/mBC - HR-positive - 1st line (L1) 84/81PALOMA-2, 2016 NCT01740427 la/mBC - HR-positive - 1st line (L1) 444/222

Pathology:  la/mBC - HR-positive - 1st line (L1); 

la/mBC - HR-positive - 1st line (L1)
PENELOPE-B, 2021PALOMA-1, 2016PALOMA-2, 2016
palbociclib plus letrozole2T1T1
palbociclib plus endocrine therapy1T1
endocrine therapy0T0
letrozole0T0T0