1. John Snow, Inc., Lusaka, Zambia.
2. Department of Sociomedical Sciences, Columbia University Mailman School of Public Health, New York, New York.
3. Department of Global Health and Population, Harvard T.H. Chan School of Public Health, Boston, Massachusetts.
4. John Snow, Inc., Boston, Massachusetts.
5. Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, Massachusetts.
6. Faculty of Medicine, Institute of Public Health, University of Heidelberg, Heidelberg, Germany.
7. Africa Health Research Institute, Mtubatuba, South Africa.
8. Francis I. Proctor Foundation, University of California, San Francisco, California.