About the Authors
Department of Earth Sciences, Addis Ababa University, Addis Ababa, Ethiopia
Brighton and Sussex Medical School, Falmer, Brighton, United Kingdom
Department of Earth Sciences, Natural History Museum, London, United Kingdom
Geography and Environment, University of Southampton, Highfield Campus, Southampton, United Kingdom
Institute of Public Health, University of Cambridge, Cambridge, United Kingdom
The authors have declared that no competing interests exist.
Conceived and designed the experiments: YBM MJN GD. Performed the experiments: YBM JSLB GD. Analyzed the data: YBM GD. Contributed reagents/materials/analysis tools: YBM JSLB PMA PB MJN NW GD. Wrote the paper: YBM JSLB PMA PB MJN NW GD.