1. Herbert Wertheim School of Public Health, University of California, San Diego, La Jolla, California, USA.
2. Department of Community Health Sciences, Boston University School of Public Health, Boston, Massachusetts, USA.
3. Department of Medicine, School of Medicine, University of California, San Diego, La Jolla, California, USA.
4. Department of Sociomedical Sciences, Mailman School of Public Health, Columbia University, New York, New York, USA.
5. Departments of Behavioral & Social Sciences and Epidemiology, Brown University School of Public Health, Providence, Rhode Island, USA.
6. Department of Community Health and Prevention, Drexel University School of Public Health, Philadelphia, Pennsylvania, USA.
7. Division of Epidemiology and Biostatistics, School of Public Health, San Diego State University, San Diego, California, USA.