{"nct_id":"NCT03486873","title":"Long-term Safety and Efficacy Extension Study for Participants With Advanced Tumors Who Are Currently on Treatment or in Follow-up in a Pembrolizumab (MK-3475) Study (MK-3475-587/KEYNOTE-587)","status":"RECRUITING","status_verified_date":"2025-10","start_date":"2018-08-21","start_date_type":"ACTUAL","primary_completion_date":"2043-08-04","primary_completion_date_type":"ESTIMATED","completion_date":"2043-08-04","completion_date_type":"ESTIMATED","phases":["PHASE3"],"tickers":["MRK"]}