Past, present, and future of global health financing: a review of development assistance, government, out-of-pocket, and other private spending on health for 195 countries, 1995–2050 - Chang, A.Y.; Cowling, K.; Micah, A.E.; Chapin, A.; Chen, C.S.; Ikilezi, G.; Sadat, N.; Tsakalos, G.; Wu, J.; Younker, T.; Zhao, Y.; Zlavog, B.S.; et al. (2019)