{"nct_id":"NCT00580684","title":"Study Comparing Prevenar® to Pneumo 23 in Reducing Carriage in Children","status":"COMPLETED","status_verified_date":"2007-12","start_date":"2003-09","start_date_type":null,"primary_completion_date":null,"primary_completion_date_type":null,"completion_date":"2004-08","completion_date_type":"ACTUAL","phases":["PHASE4"],"tickers":["PFE"]}