{"nct_id":"NCT00544271","title":"Immunogenicity, Antibody Persistence and Safety of GSK Biologicals' DTPa (INFANRIX) and dTpa (BOOSTRIX) Vaccines.","status":"TERMINATED","status_verified_date":"2016-09","start_date":"2003-05","start_date_type":null,"primary_completion_date":null,"primary_completion_date_type":null,"completion_date":"2004-01","completion_date_type":"ACTUAL","phases":["PHASE4"],"tickers":["GSK"]}