1. WHO. Cancer Fact Sheet No. 297 [Internet]. 2015 [cited 2016 Feb 10]. Available from: http://www.who.int/mediacentre/factsheets/fs297/en/ . Accessed 9 March 2016.
2. Cancer Research UK [Internet]. 2016 [cited 2016 Feb 10]. Available from: http://www.cancerresearchuk.org/health-professional/worldwide-cancer-statistics . Accessed 9 March 2016.
3. Torre LA, Bray F, Siegel RL, Ferlay J, Lortet-tieulent J, Jemal A. Global Cancer Statistics, 2012. CA a cancer J Clin. 2015;65:87–108.
4. Scottish Executive. Cancer in Scotland: Action for change. 2001.
5. Gray L, Leyland AH. Is the “Glasgow effect” of cigarette smoking explained by socio-economic status? A multi-level analysis. MBC Public Heal. 2009;9:245.