{"nct_id":"NCT03675737","title":"Pembrolizumab (MK-3475) Plus Chemotherapy Versus Placebo Plus Chemotherapy in Participants Gastric or Gastroesophageal Junction (GEJ) Adenocarcinoma (MK-3475-859/KEYNOTE-859)","status":"COMPLETED","status_verified_date":"2025-07","start_date":"2018-11-08","start_date_type":"ACTUAL","primary_completion_date":"2022-10-03","primary_completion_date_type":"ACTUAL","completion_date":"2025-03-03","completion_date_type":"ACTUAL","phases":["PHASE3"],"tickers":["MRK"]}