1. National Institute for Medical Research Muhimbili Research Centre Dar es Salaam Tanzania
2. Kilimanjaro Christian Medical University College of Tumaini University Moshi Tanzania
3. Mbeya College of Health and Allied Sciences University of Dar es Salaam Mbeya Tanzania
4. Department of Epidemiology and Biostatistics, Institute of Public Health Kilimanjaro Christian Medical University College Moshi Tanzania
5. Kilimanjaro Clinical Research Institute Kilimanjaro Christian Medical Centre Moshi Tanzania
6. Center for Global Health, Department of Neurology, Faculty of Medicine Technical University Munich Munich Germany
7. Centre for Global Health, Institute of Health and Society University of Oslo Oslo Norway