palbociclib,ribociclib
medsir,Pfizer,novartis
['palbo']
outstanding discussion by - cdk4/6 1st vs 2nd line? cdk4/6 after cdk4/6 (palbo after pablo)? et backbone switch based on esr1 mutations? #asco23 
Breast medical oncologist @TuftsMedicalCtr | Tweets are my own and not medical advice | 🇲🇽