Ulf Ahlgren, Umea University (IMAGE) Umea University Caption This is Ulf Ahlgren, Umeå Centre for Molecular Medicine (UCMM) Credit Mattias Pettersson Usage Restrictions Mattias Pettersson 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.