1. Centre for Research on Epidemiology of Disasters, Research Institute on Health and Society, Université Catholique de Louvain, Brussels, Belgium.
2. World Health Organization, Regional Office for Africa, Dakar Hub, Dakar, Senegal.
3. Brigham and Women's Hospital, Department of Emergency Medicine, Boston, MA 02115, USA.
4. Stanford University, Center for Health Policy, Stanford, CA 94305, USA.