{"nct_id":"NCT05909397","title":"A Study of Vepdegestrant (ARV-471, PF-07850327) Plus Palbociclib Versus Letrozole Plus Palbociclib in Participants With Estrogen Receptor Positive, Human Epidermal Growth Factor Negative Advanced Breast Cancer","status":"ACTIVE_NOT_RECRUITING","status_verified_date":"2025-05","start_date":"2023-08-09","start_date_type":"ACTUAL","primary_completion_date":"2026-12-30","primary_completion_date_type":"ESTIMATED","completion_date":"2026-12-30","completion_date_type":"ESTIMATED","phases":["PHASE3"],"tickers":["PFE"]}