1. WHO. Depression. www.who.int/mental_health/management/depression/definition/en/, 2010.
2. Measuring the global burden of disease and risk factors, 1990–2001. In Global burden of diseases and risk factors;Lopez,2006
3. Depression in late life: review and commentary;Blazer;J Gerontol A Biol Sci Med Sci,2003
4. Depression and public health: an overview;Cassano;J Psychosam Res,2002
5. Depression as a major component of public health for older adults;Chapman;Prev Chron Dis,2008