1. IARC Scientific Publications No. 155,2002
2. Ferlay J, Shin HR, Bray F, et al (2010) GLOBOCAN 2008, Cancer incidence and mortality worldwide: IARC CancerBase no 10. International Agency for Research on Cancer, Lyon. Available at: http://globocan.iarc.fr . Accessed 17 Aug 2010
3. Jemal A, Bray F, Center MM et al (2011) Global cancer statistics. Ca Cancer J Clin. doi: 10.3322/caac.20107
4. Food and Agricultural Organization (2010) http://faostat.fao.org/site/610/DesktopDefault.aspx? PageID = 610#ancor. Accessed 30 April 2010
5. United Nations Organization, Program of Human Development (2010) Human development index rankings. Available at: http://hdr.undp.org/en/statistics/;2009 . Accessed 27 April 2010