1. Energy and Resources Group, and
2. Division of Environmental Health Sciences, University of California, Berkeley, Berkeley, California, USA
3. School of Population and Public Health, University of British Columbia, Vancouver, British Columbia, Canada
4. International Institute for Applied Systems Analysis, Laxenburg, Austria
5. Air and Climate Unit, Institute for Environment and Sustainability, European Commission Joint Research Centre, Ispra, Italy
6. Global Alliance for Clean Cookstoves, Washington, DC, USA