Photo of Researcher (image) Karolinska Institutet Share Print E-Mail Caption Mikael Ryden, professor and senior physician at the Department of Medicin, Huddinge, Karolinska Institutet. Credit Ulf Sirborn. Usage Restrictions None Share Print E-Mail 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.