Olof Östergren, Stockholm University (IMAGE) Stockholm University Caption This is a portrait of Olof Östergren. Credit Leila Zoubir/Stockholm University Usage Restrictions To be published when reporting about Stockholm University or Olof Östergrens research 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.