Authors (IMAGE) Umea University Caption (Left to right:) Co-first authors Saskia F. Erttmann and Anetta Härtlova, and senior author Nelson O. Gekara. Credit Umeå University Usage Restrictions None 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.