Annie Pedersen, University of Gothenburg (IMAGE) University of Gothenburg Caption This is Annie Pedersen, PhD student at Sahlgrenska Academy, University of Gothenburg, one of the lead authors of the study. Credit Photo by Sven-Ojvind Swahn 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.