{"nct_id":"NCT00984139","title":"Persistence of Immunity Against Hepatitis B in 12-13 Year Old Adolescents After Infant Hepatitis B Vaccination","status":"COMPLETED","status_verified_date":"2016-09","start_date":"2009-10-12","start_date_type":null,"primary_completion_date":"2010-04-07","primary_completion_date_type":"ACTUAL","completion_date":"2010-04-07","completion_date_type":"ACTUAL","phases":["PHASE4"],"tickers":["GSK"]}