Ashton and Blennow (IMAGE) University of Gothenburg Caption Nicholas Ashton and Kaj Blennow, Sahlgrenska Academy at the University of Gothenburg. Credit Photo by University of Gothenburg Usage Restrictions For editorial use, no 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.