Martin Hällberg and Hrishikesh Das (IMAGE) University of Gothenburg Caption Martin Hällberg and Hrishikesh Das, Karolinska Insititutet. Credit Photo by Ulf Sirborn Usage Restrictions For editorial use when publishing news and other stories linked to Karolinska Institutet. Not for commercial use. License Original 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.