letrozole,palbociclib
pfizer,novartis
['letrozole', 'palbociclib', 'breast', 'paloma-2']
overall survival with first-line palbociclib plus letrozole vs placebo plus letrozole in women with estrogen receptor positive/human epidermal growth factor receptor 2 negative advanced breast cancer: analyses from paloma-2. #asco22 or 
Medicina Interna - Oncología Clínica - Profesor Titular @UPBColombia - Clínica Astorga. #Medellín / #Colombia mlujanonco@gmail.com #OncTwitter #Metaanalysis