1. World Health Organization. Depression Fact Sheet No 369. http://www.who.int/mediacentre/factsheets/fs369/en/ . Published 2015. Accessed 24 Feb 2016.
2. Wittchen, H. U., Jacobi, F., Rehm, J., et al. (2011). The size and burden of mental disorders and other disorders of the brain in Europe 2010. Eur Neuropsychopharmacol, 21(9), 655–679. doi: 10.1016/j.euroneuro.2011.07.018 .
3. World Health Organization N. The global burden of disease: 2004 update. Vol 2010, 2008. doi:10.1038/npp.2011.85.
4. Expert platform on mental health—focus on depression. The depression challenge—Brussels declaration. http://www.depressionplatform.eu/the-depression-challenge . Accessed 24 Feb 2016.
5. Isometsä E, Kinnunen E, Kivekäs T, et al. 2014 Depression: current care summary, http://www.kaypahoito.fi/web/english/guidelineabstracts/guideline?id=ccs00062 .