1. Department of Pediatrics, Howard University, Washington, District of Columbia.
2. Department of Human Genetics, Howard University, Washington, District of Columbia.
3. Department of Pharmacology, Alcohol Research Center, Howard University, Washington, District of Columbia.
4. Department of Psychiatry, Howard University Hospital, Washington, District of Columbia.
5. Georgetown-Howard University Center for Clinical and Translational Science, Howard University, Washington, District of Columbia.
6. Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland.