London, April 16 -- Scientists have discovered nearly 80 genes that could be linked to depression, an advance that may help explain why some people are at a higher risk of developing the condition.The study led by researchers at the University of Edinburgh in the UK could also help develop drugs to tackle mental ill-health.Depression is the leading cause of disability worldwide, according to the research published in the journal Nature Communications.Life events - such as trauma or stress - can contribute to its onset, but it is not clear why some people are more likely to develop the condition than others.

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