Olov Rolandsson (IMAGE) Umea University Caption This is professor Olov Rolandsson. Credit Mattias Pettersson Usage Restrictions Free for use only 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.