1. Department of Public Health and Environment, World Health Organization, Geneva, Switzerland
2. Department of Environmental Health Sciences, School of Public Health, University of California, Berkeley, Berkeley, California, USA
3. Department of Public Health and Policy, Institute of Psychology, Health and Society, University of Liverpool, Liverpool, United Kingdom
4. Global Alliance for Clean Cookstoves, Washington, DC, USA
5. Division of Epidemiology, School of Public Health, University of California, Berkeley, Berkeley, California, USA
6. Institute for Medical Informatics, Biometry and Epidemiology, Ludwig-Maximilians-Universität Munich, Munich, Germany
7. Population Division, Department of Economic and Social Affairs, United Nations, New York, New York, USA