Press photo, Ben Murrell (IMAGE) Karolinska Institutet Caption Ben Murrell, assistant professor at the Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet. Credit Johannes Frandsén Usage Restrictions This photo should only be used when reporting about Ben Murrell's research. 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.