1. School of Public HealthKwame Nkrumah University of Science and Technology, Kumasi, Ghana
2. Department of Global Health and DevelopmentLondon School of Hygiene and Tropical Medicine, London, UK
3. Navrongo Health Research Centre, Navrongo, Ghana
4. Department of StatisticsBolgatanga Polytechnic, Bolgatanga, Ghana
5. Swiss Tropical and Public Health InstituteUniversity of Basel, Basel, Switzerland
6. Department of General Practice and Health Services ResearchHeidelberg University Hospital, Heidelberg, Germany
7. Department of PhilosophyReligion and Theology, Moi University, The Eldoret, Kenya