1 Helena Hansen is with the David Geffen School of Medicine, University of California, Los Angeles. Ayana Jordan is with the New York University School of Medicine, New York, NY. Alonzo Plough is with the Robert Wood Johnson Foundation, Princeton, NJ. Margarita Alegria is with Massachusetts General Hospital, Boston, MA. Chinazo Cunningham is with the Albert Einstein College of Medicine, Bronx, NY. Andrey Ostrovsky is with Social Innovation Ventures, Boston, MA. Helena Hansen is also a Guest Editor of this supplement issue.