Photo of Researcher (IMAGE) Karolinska Institutet Caption Mikael Ryden, professor and senior physician at the Department of Medicin, Huddinge, Karolinska Institutet. Credit Ulf Sirborn. Usage Restrictions None License Licensed 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.