1. Navrongo Health Research Centre, Ghana Health Service, Navrongo, Ghana
2. Health Systems Working Group, INDEPTH Network, Accra, Ghana
3. Health Economics Unit, School of Public Health and Family Medicine, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
4. Office of the Vice Chancellor, University of Health and Allied Sciences, Ho, Ghana
5. School of Public Health, Faculty of Health Sciences, University of the Witswatersrand, Johannesburg, South Africa
6. Department of Mathematics and Statistics, Njala University, Njala, Sierra Leone