Stefan Marklund, Umeå University (IMAGE) Umea University Caption Stefan Marklund, is professor of Clinical Chemistry at Umeå University and one of the authors of the article. Credit Mattias Pettersson Usage Restrictions This photo may only be used 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.