{"nct_id":"NCT03881111","title":"First-line Esophageal Carcinoma Study With Chemo vs. Chemo Plus Pembrolizumab (MK-3475-590/KEYNOTE-590)-China Extension Study","status":"WITHDRAWN","status_verified_date":"2020-02","start_date":"2019-01-21","start_date_type":"ACTUAL","primary_completion_date":"2021-05-11","primary_completion_date_type":"ESTIMATED","completion_date":"2022-05-11","completion_date_type":"ESTIMATED","phases":["PHASE3"],"tickers":["MRK"]}