{"nct_id":"NCT00985153","title":"Safety, Tolerability, and Immunogenicity of 3 Frozen ProQuad Consistency Lots in Healthy Children (V221-012)(COMPLETED)","status":"COMPLETED","status_verified_date":"2015-11","start_date":"2000-03","start_date_type":null,"primary_completion_date":"2001-05","primary_completion_date_type":"ACTUAL","completion_date":"2001-05","completion_date_type":"ACTUAL","phases":["PHASE3"],"tickers":["MRK"]}