Per-Olof Berggren, Karolinska Institutet (IMAGE) Karolinska Institutet Caption Per-Olof Berggren, Ph.D., is a Professor of Experimental Endocrinology at Karolinska Institutet in Sweden. Credit Stefan Zimmerman Usage Restrictions This image may only be reproduced/published in connection to editorial reports about Professor Per-Olof Berggren's research. 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.