1. College of Nursing, Charles R. Drew University of Medicine and Science, Los Angeles, California, USA.
2. College of Medicine, Charles R. Drew University of Medicine and Science, Los Angeles, California, USA.
3. David Geffen School of Medicine, University of California, Los Angeles, California, USA.
4. Institute for Global Health Sciences, University of California, San Francisco, California, USA.
5. Health Services Research and Policy Core, Urban Health Institute, Charles R. Drew University of Medicine and Science, Los Angeles, California, USA.
6. David Geffen School of Medicine and Fielding School of Public Health, University of California, Los Angeles, California, USA.