Khedidja Hedna and Margda Waern (IMAGE) University of Gothenburg Caption PhD student Khedidja Hedna and Professor Margda Waern, University of Gothenburg. Credit Photo by Kristina Bath and Johan Wingborg 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.