Ryan Wagner, Umeå University (IMAGE) Umea University Caption This is doctoral student Ryan G. Wagner, Department of Public Health and Clinical Medicine, Unit of Epidemiology and Global Health at Umeå University. Credit Umeå University Usage Restrictions This photo may only be used in the context of 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.