The Jackson Heart Study Subcommittees operate as a function of the Steering Committee to insure that specific tasks related to Study operations are addressed by representatives who have the expertise and interest to make decisions on behalf of the Study. Subcommittees typically last throughout one contract cycle. Subcommittee Chairs are appointed by the study Director and PI and approved by the Steering Committee. Subcommittees report to the Steering Committee monthly based on a schedule established by the Steering Committee.