Access to data is controlled by the NHLBI Data Access Committee (DAC) utilizing the database of Genotypes and Phenotypes (dbGaP) permissions infrastructure. In order to access controlled-access data in BDC, an investigator must have an approved Data Access Request (DAR) in dbGaP. The role of the NHLBI DAC is to review and approve (or deny) investigator submitted DARs and to ensure investigator compliance with the NIH Genomic Data Sharing Policy.