Ingela Helmfrid (IMAGE) Linköping University Caption Ingela Helmfrid, PhD student at Linköping University and biologist at Region Östergötland. Credit Region Östergötland Usage Restrictions Please use appropriate caption and credit. 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.