1. Japan Ministry of Internal Affairs and Communications. Statistics Bureau. Available from: http://www.stat.go.jp/data/topics/topi721.html. Accessed September 15, 2013.
2. The European Commission and the Economic Policy Committee (AWG). The 2012 Ageing Report: economic and Budgetary Projections for the EU27 Member States (2010–2060). Brussels: European Union; 2012.
3. Administration on Ageing, Administration for Community Living. A profile of Older Americans 2013. Washington: US Department of Health and Human Services; 2014.
4. Global cancer statistics 2018: GLOBOCAN estimates of incidence and mortality worldwide for 36 cancers in 185 countries
5. The Inflammation and Liver Cancer