{"nct_id":"NCT00411697","title":"Persistence of Hepatitis B Antibody Levels & Immune Response to a Hepatitis B Vaccine Challenge","status":"COMPLETED","status_verified_date":"2016-10","start_date":"2006-12","start_date_type":null,"primary_completion_date":"2007-05","primary_completion_date_type":"ACTUAL","completion_date":"2007-05","completion_date_type":"ACTUAL","phases":["PHASE4"],"tickers":["GSK"]}