News & Events Efficacy and Safety of Ribociclib With Letrozole in US Patients Enrolled in the MONALEESA-2 StudyEfficacy and Safety of Ribociclib With Letrozole in US Patients Enrolled in the MONALEESA-2 Studyby Quality Cancer Care AllianceJuly 21, 2020Clinical Updateshttps://pubmed.ncbi.nlm.nih.gov/31160171/