Medical expert weighs in on Robin Williams' struggle with depression, substance abuse

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Medical expert weighs in on Robin Williams' struggle with depression, substance abuse

Medical expert weighs in on Robin Williams' struggle with depression, substance abuse
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Medical expert weighs in on Robin Williams' struggle with depression, substance abuse

by CBSTV Videos 3:41 mins

Columbia University's psychiatry chairman Dr. Jeffrey Lieberman joins the "CBS This Morning" co-hosts to discuss effects of the comedic legend's battles with depression, drugs and alcohol.

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