About the Authors
Epicentre, Paris, France
Medecins Sans Frontieres, Barcelona, Spain
Medecins Sans Frontieres, Paris, France
The authors have declared that no competing interests exist.
Conceived and designed the experiments: GG MZ OD ID ML VB BP. Performed the experiments: GG MZ. Analyzed the data: GG MZ BP. Contributed reagents/materials/analysis tools: GG MZ VB BP. Wrote the paper: GG.