1. College of Medicine, Charles R. Drew University of Medicine and Science, Los Angeles, California;
2. David Geffen School of Medicine, UCLA, Los Angeles, California;
3. Medical Education Program, Department of Surgery, Oregon Health and Science University, Portland, Oregon;
4. Preventive and Social Medicine, Charles R. Drew University of Medicine and Science, Los Angeles, California;
5. Department of Public Health, University of California, Irvine, California