Katja Petzold, Karolinska Institutet (IMAGE) Karolinska Institutet Caption Katja Petzold, Associate Professor at the Department of Medical Biochemistry and Biophysics at Karolinska Institutet in Sweden. Credit Gunnar Ask Usage Restrictions The photo may only be used in connection to reports about Dr Petzold'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.