The Center for Inherited Disease Research (CIDR) is a centralized facility that concentrates primarily on multifactorial hereditary disease although linkage analysis of single gene disorders can also be accommodated. CIDR was established in 1996 as a joint effort by eight institutes at the National Institutes of Health (NIH). It has since expanded to 13 Institutes. An application for CIDR Services is welcome from any investigator, world-wide. Access to CIDR is through a peer-review process.