Marie Eriksson, Umeå University (IMAGE) Umea University Caption This is Marie Eriksson, associate professor and statistician at Umeå University and co-author of the study Credit Umeå University Usage Restrictions This photo may only be used in contexts related to this news release. 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.