1. Institute of Development Studies, University of Dar es Salaam, Dar es Salaam, Tanzania
2. Primary Health Care Institute (PHCI), Iringa, Tanzania
3. DBL-Centre for Health Research and Development, Faculty of Health and Medical Sciences, University of Copenhagen, Frederiksberg, Denmark
4. Umeå International School of Public Health (UISPH), Umeå University, Umeå, Sweden