1. Johns Hopkins University, Berman Institute of Bioethics, Baltimore, USA
2. National Institutes of Health, Bethesda, USA
3. Centers for Disease Control and Prevention, Atlanta, USA
4. The Fenway Institute and Harvard Medical School, Boston, USA
5. Departments of Global Health, Medicine and Epidemiology, University of Washington, Seattle, USA
6. University of California, San Francisco, USA
7. University of Toronto, Toronto, Canada