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"There are a lot of misconceptions regarding sadness and major depressive disorder (MDD). Knowing the differences, causes and treatments can lead to a better quality of life for you or someone you know. So how much do you really understand about the condition?"^^<http://www.w3.org/2001/XMLSchema#string>
<http://health.howstuffworks.com/mental-health/depression/facts/major-depressive-disorder-quiz4.htm>