1. Research Service; Veteran Affairs Medical Center; Washington District of Columbia
2. Howard University Cancer Center; Washington District of Columbia
3. Department of Biochemistry and Molecular Biology; Washington District of Columbia
4. Department of Pathology; College of Medicine; Washington District of Columbia
5. Department of Environmental Health and Engineering; Johns Hopkins Bloomberg School of Public Health, and Department of Oncology; Johns Hopkins School of Medicine; Baltimore Maryland
6. National Human Genome Center; Howard University; Washington District of Columbia
7. Department of Pharmacology; College of Medicine; Washington District of Columbia