Major depressive disorder is one of the most commonly seen psychiatric disorders all over the world. If it is not treated, major depressive disorder may lead to early death, worsening in general health and considerable disability. The etiology and physiopathology of major depressive disorder has not been able to be illuminated. Multiple factors are important in the etiology of depression. Also, it should be considered that there are a few clinically different sub-types of depression whose diagnosis... Mehr