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Editor's Note: Katherine Keyes, interviewed for this episode of Morning Edition, is a professor of epidemiology at the Columbia University Mailman School of Public Health.

Also joining this important conversation is Dr. Christina Brezing, assistant professor of clinical psychiatry at Columbia University.

Editor's Note: Donna L. Farber, author of this WSJ Essay, is the George H. Humphreys, II Professor of Surgical Sciences at the Columbia University Vagelos College of Physicians and Surgeons.