1. Nancy L. Jones and Rina Das are with the Division of Extramural Scientific Programs, National Institute on Minority Health and Health Disparities (NIMHD), Bethesda, MD. Nancy Breen and Tilda Farhat are with the Office of Science Policy, Strategic Planning, Analysis, Reporting, and Data, NIMHD, Bethesda, MD. Richard Palmer is with the Office of Extramural Research Administration, NIMHD, Bethesda, MD. The authors are also Guest Editors for this supplement issue.