Photo of Researchers (IMAGE) Karolinska Institutet Caption From left: Agustin Sola Carvajal, Maria Eriksson and Gwladys Revechon, researchers at Sweden's Karolinska Institutet and co-authors of the study. Credit Daniel Whisenant 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.