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What causes the winter blues?

Name: What causes the winter blues?
Uploaded: 2014-10-21T08:05:00-0400
Duration: 35 s
Description: A new study explores the cause of seasonal affective disorder (SAD). People with SAD process significantly less serotonin in winter than summer. Gayle King reports.

A new study explores the cause of seasonal affective disorder (SAD). People with SAD process significantly less serotonin in winter than summer. Gayle King reports.