1. Carrin G, Doetinchem O, Kirigia J, Mathauer I, Musango L. Social health insurance: how feasible is its expansion in the African region? In: Pocock J, editor. Social Security in Africa. The Hague: Institute of Social Studies; 2008. p. 7–8.
2. Spaan E, Mathijssen J, Tromp N, MacBain F, Have A, Baltussen R. The impact of health insurance in Africa and Asia: a systematic review. Bull World Health Org. 2012;90:685–92.
3. Nsiah-Boateng E, Jousten A. Eight Years of National Health Insurance in Ghana: evaluation of the health financing sub-functions. In: Roscoe C, editor. Ghana: Social, Economic and Political Issues. New York: Nova; 2014. p. 337–55.
4. Wipf J, Garand D. Performance Indicators for Microinsurance. A Handbook for Microinsurance Practitioners. 2nd ed. Luxembourg: ADA asbl; 2010.
5. Li J, Huang KY, Jin J, Shi J. A survey on statistical methods for health care fraud detection. Health Care Manag Sci. 2008. doi: 10.1007/s10729-007-9045-4 .