1. Department of Community Health, Tufts University, Medford, Massachusetts, USA.
2. The Fenway Institute, Fenway Health, Boston, Massachusetts, USA.
3. Department of Obstetrics and Gynecology, Tufts University School of Medicine, Boston, Massachusetts, USA.
4. Department of Social and Behavioral Sciences, University of California, San Francisco, San Francisco, California, USA.
5. Division of Adolescent and Young Adult Medicine, Boston Children's Hospital, Boston, Massachusetts, USA.
6. Department of Pediatrics, Harvard Medical School, Boston, Massachusetts, USA.
7. Department of Public Health, New York Medical College, Valhalla, New York, USA.
8. Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, Massachusetts, USA.
9. Department of Bioethics and Humanities, University of Washington School of Medicine, Seattle, Washington, USA.
10. Department of Health Services, University of Washington School of Public Health, Seattle, Washington, USA.
11. Department of Social and Behavioral Sciences, Harvard T.H. Chan School of Public Health, Boston, Massachusetts, USA.