Per Tornvall (IMAGE) Karolinska Institutet Caption Per Tornvall, senior physician and professor at the Department of Clinical Science and Education, Södersjukhuset (Stockholm South General Hospital), Karolinska Institutet, Sweden. 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.