Jonas Ludvigsson, Karolinska Institutet (IMAGE) Karolinska Institutet Caption Jonas Ludvigsson, professor in the Department of Medical Epidemiology and Biostatistics at Karolinska Institutet in Sweden. Credit Gustav Mårtensson 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.