Introduction: New Strategies for Improving the Treatment of Depression

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Several types of depression may be encountered by a clinician. The depression may be a primary uncomplicated disorder, a single episode, recurrent, chronic, or dysthymic. Similarly, depressions can be comorbid with other disorders, either occurring after the onset of an established psychiatric disorder, such as panic disorder, obsessive compulsive disorder, or substance abuse, or complicated by psychiatric or even medical conditions.