Stress and immune system study en Dr. Greg Discusses New Research On How Immune System Ages <p>LEXINGTON, Ky.&nbsp; -&nbsp; In this week's episode of "Dr. Greg Davis On Medicine" the host speaks with Dr. Suzanne Segerstrom, professor of psychology at the University of Kentucky about a multi-discipline research project studying how the human immune system ages and what role stress may play in the process.</p> Wed, 05 Sep 2012 13:09:58 +0000 Greg Davis 20189 at