{"nct_id":"NCT00161967","title":"TBE Antibody Persistence and Booster Vaccination Study in Children and Adolescents (Follow-up to Study 209)","status":"COMPLETED","status_verified_date":"2015-05","start_date":"2005-05","start_date_type":null,"primary_completion_date":"2008-07","primary_completion_date_type":"ACTUAL","completion_date":"2008-11","completion_date_type":"ACTUAL","phases":["PHASE4"],"tickers":["PFE"]}