Alzheimer's Biomarkers Surprise Scientists (image) Washington University School of Medicine Caption Anne Fagan, right, led a group of researchers who discovered that some markers for early Alzheimer's disease change significantly after patients develop dementia. Fagan is pictured with graduate student Courtney Sutphen. Credit Michael C. Purdy Usage Restrictions None 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.