40
Participants
Start Date
July 8, 2016
Primary Completion Date
May 21, 2018
Study Completion Date
October 7, 2020
Laboratory Biomarker Analysis
Correlative studies
Letrozole
Given PO
Ribociclib
Given PO
Mayo Clinic, Rochester
Mayo Clinic in Arizona, Scottsdale
Mayo Clinic in Florida, Jacksonville
Lead Sponsor
National Cancer Institute (NCI)
NIH
Mayo Clinic
OTHER