{"nct_id":"NCT00263679","title":"Assessment of GSK Biologicals' Tdap Candidate Vaccine Administered as a Booster (6th Dose) in Terms of Immunogenicity and Safety to Children and Adolescents Previously Vaccinated With Five Doses of an Acellular Pertussis-containing Vaccine.","status":"COMPLETED","status_verified_date":"2016-09","start_date":"2003-11","start_date_type":null,"primary_completion_date":"2004-05","primary_completion_date_type":"ACTUAL","completion_date":"2004-10","completion_date_type":"ACTUAL","phases":["PHASE3"],"tickers":["GSK"]}