Introduction and background
Depression is a global health problem but which can be contained using non-pharmacological and pharmacological approaches (Dhingra and Parle, 2011). It is the leading cause of mental disability in the whole world and it remains one of the most undertreated health issues in old age (Barry, et al, 2012). In United States, a tenth of the adult population is affected by depression each year and it is estimated that by the end of this decade depression will be the second leading cause of health disability (Dhingra and Parle, 2011). According to Dhingra, in 2011, depression was the fourth most costly disease ...