Marcus Schmitt-Egenolf, Umeå University (IMAGE) Umea University Caption Marcus Schmitt-Egenolf is a researcher at the Department of Public Health and Clinical Medicine at Umeå University and senior author of the study. Credit Mattias Pettersson Usage Restrictions Mattias Pettersson/Umeå University 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.