Nathanael Sirili, Umea University (IMAGE) Umea University Caption This is Nathanael Sirili, doctoral student at the Department of Public Health and Clinical Medicine at Umeå University. Credit Lena Mustonen 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.