Financing health in sub-Saharan Africa 1990–2050: Donor dependence and expected domestic health spending by Apeagyei, AE, Lidral-Porter, B, Patel, N, Solorio, J, Tsakalos, G, Wang, Y, Warriner, W, Wolde, A, Zhao, Y, Dieleman, JL, Nonvignon, J