1. Andrews G, Sanderson K, Slade T, Issakidis C. Why does the burden of disease persist? Relating the burden of anxiety and depression to effectiveness of treatment. Bull World Health Organ. 2000;78:446–54.
2. Mental Health Foundation. http://www.mentalhealth.org.uk/help-information/mental-health-statistics/anxiety-statistics/ . Accessed 22 Dec 2014.
3. Layard R. The depression report: A new deal for depression and anxiety disorders, (No. 15). Centre for Economic Performance, LSE; 2006.
4. Ferrari AJ, Charlson FJ, Norman RE, Patten SB, Freedman G, Murray CJ, et al. Burden of depressive disorders by country, sex, age, and year: findings from the global burden of disease study 2010. PLoS Med. 2013;10(11):e1001547.
5. Andrews G, Henderson S, Hall W. Prevalence, comorbidity, disability and service utilisation Overview of the Australian National Mental Health Survey. Br J Psychiatry. 2001;178:145–53.