Bengt Järvholm (IMAGE) Umea University Caption Bengt Järvholm, professor at Department of Public Health and Clinical Medicine, Umeå University, Sweden Credit Mattias Pettersson Usage Restrictions Media use 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.