@book{ BB25161598, author = "Wang, Huihui and Otoo, Nathaniel and Dsane-Selby, Lydia", title = "Ghana National Health Insurance Scheme : improving financial sustainability based on expenditure review", publisher = "World Bank Group", year = "2017", series = "A World Bank study", number = "", URL = "https://ci.nii.ac.jp/ncid/BB25161598" }