Real-world Treatment Patterns and Effectiveness of Palbociclib and AI Therapy
Status: ACTIVE_NOT_RECRUITING
Study type: OBSERVATIONAL
Conditions: Metastatic Breast Cancer
Interventions: DRUG: Palbociclib + an aromatase inhibitor|DRUG: Palbociclib + Letrozole|DRUG: Letrozole
Sponsor: Pfizer