Hanna C Persson (IMAGE) University of Gothenburg Caption Hanna C Persson, Sahlgrenska Academy, University of Gothenburg. Credit Photo: Josefin Bergenholtz 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.