The Mitochondrial Disease Sequence Data Resource (MSeqDR) is a central web portal that makes it easier to organize and analyze information from individuals and families with diagnosed and suspected mitochondrial disease. Currently, there is no mechanism in place to allow this group of individuals and families to choose who can access and analyze their information. The purpose of this project is to (1) Make it easier for participants to share their genomic data and (2) allow participants and/or their families to choose who can have access to and analyze these data, and how easily their data can be identified.