1. Center for Injury Prevention and Community Safety, Peercorps Trust Fund, Dar es Salaam, Tanzania
2. Department of Epidemiology, Biostatistics and Occupational Health, McGill University, Montreal, Quebec, Canada
3. Injury Epidemiology and Prevention Research Group, Turku Brain Injury Center, Division of Clinical Neurosciences, University of Turku, Turku, Finland
4. Heidelberg Institute of Global Health, University of Heidelberg, Heidelberg, Germany