A Study Evaluating the Efficacy and Safety of Inavolisib Plus CDK4/6 Inhibitor and Letrozole vs Placebo + CDK4/6i and Letrozole in Participants With Endocrine-Sensitive PIK3CA-Mutated, Hormone Receptor-Positive, HER2-Negative Advanced Breast Cancer
Conditions
Interventions
- DRUG: Inavolisib
- DRUG: Placebo
- DRUG: CDK4/6i
- DRUG: Letrozole
Sponsor
Hoffmann-La Roche