Zigman Lab Group (IMAGE) UT Southwestern Medical Center Caption A study that sheds light on the hormone ghrelin's role in blood glucose regulation included researchers (l-r) Drs. Jeffrey Zigman, Roger Unger, Bharath Mani, and Eric Berglund. Credit UT Southwestern Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.