1. World Health Organization. Global spending on health: a world in transition. Geneva: WHO; 2019
2. Spending on health in Europe: entering a new era. Denmark: WHO Regional Office for Europe; 2021
3. OECD. Projecting OECD health and long-term care expenditures: what are the main drivers? Economics Department Working Papers. 2006;477:1-81
4. Dormont B, Grignon M, Huber H. Health expenditure growth: reassessing the threat of ageing. Health Economics. 2006;15(9):947-963
5. Seshamani M, Gray A. Age, proximity to death and future demands on the NHS. London: Office of Health Economics; 2004