1. The RAND Corporation, Santa Monica, CA, USA
2. U.S. Department of Veterans Affairs and University of California, Los Angeles, Los Angeles, CA, USA
3. Healthy African American Families, Los Angeles, CA, USA
4. University of California, Berkley
5. Healthy African American Families and Charles Drew University of Medicine and Science, Los Angeles, CA, USA
6. University of California, Los Angeles, Los Angeles, CA, USA