{"nct_id":"NCT03040999","title":"Study of Pembrolizumab (MK-3475) or Placebo With Chemoradiation in Participants With Locally Advanced Head and Neck Squamous Cell Carcinoma (MK-3475-412/KEYNOTE-412)","status":"COMPLETED","status_verified_date":"2025-08","start_date":"2017-04-05","start_date_type":"ACTUAL","primary_completion_date":"2022-05-31","primary_completion_date_type":"ACTUAL","completion_date":"2024-08-21","completion_date_type":"ACTUAL","phases":["PHASE3"],"tickers":["MRK"]}