1. UK Parliament The ageing population 2010 http://www.parliament.uk/business/publications/research/key-issues-for-the-new-parliament/value-for-money-in-public-services/the-ageing-population/
2. National Council on Ageing 2015 https://www.ncoa.org/healthy-aging/chronic-disease/
3. AAMC Association of American Medical Colleges Impact of Budget Cuts on America's Health 2014 https://www.aamc.org/advocacy/campaigns_and_coalitions/budgetcuts/
4. OECD HS Focus on Health Spending 2016 http://www.oecd.org/health/health-systems/Focus-Health-Spending-2015.pdf