{"nct_id":"NCT01245049","title":"Immunogenicity and Safety of GSK Biologicals' Boostrix Polio Vaccine in 3 and 4-year-old Children","status":"COMPLETED","status_verified_date":"2018-06","start_date":"2011-04-01","start_date_type":null,"primary_completion_date":"2012-03-27","primary_completion_date_type":"ACTUAL","completion_date":"2012-04-02","completion_date_type":"ACTUAL","phases":["PHASE3"],"tickers":["GSK"]}