{"nct_id":"NCT06395090","title":"A Study of Pembrolizumab in Combination With Investigational Agents in Pediatric and Young Adult Participants With Hematologic Malignancies or Solid Tumors (MK-9999-01B/LIGHTBEAM-U01)","status":"WITHDRAWN","status_verified_date":"2025-04","start_date":"2025-01-15","start_date_type":"ESTIMATED","primary_completion_date":"2029-06-30","primary_completion_date_type":"ESTIMATED","completion_date":"2029-06-30","completion_date_type":"ESTIMATED","phases":["PHASE1","PHASE2"],"tickers":["MRK"]}