1. Centers for Disease Control and Prevention, 1600 Clifton Rd, MSE-37, Atlanta, Georgia 30333, USA
2. Centers for Behavioral & Preventive Medicine, The Miriam Hospital/Brown Medical School, Providence, Rhode Island, USA
3. Centerforce, San Quentin, California, USA
4. Jackson State University, Jackson, Mississippi, USA
5. Medical College of Wisconsin, Milwaukee, Wisconsin, USA
6. University of Wisconsin Medical School, Madison, Wisconsin, USA
7. Jackson State University, Jackson, Mississippi, and University of Alaska Anchorage, Anchorage, Alaska, USA