Zetterberg, Ashton and Blennow (IMAGE) University of Gothenburg Caption Henrik Zetterberg, Nicholas Ashton and Kaj Blennow Credit University of Gothenburg Usage Restrictions No restrictions 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.