Study Authors (image) University of Vienna Caption Pictured are the authors of the study from the University of Vienna. Back (from left to right): Christiane Gruber-Dorninger, Hanna Koch, Holger Daims. Front: Arno Schintlmeister, Michael Wagner. Credit Copyright: Allen Tsao, University of Vienna Usage Restrictions The image may only be used with appropriate caption or credit. 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.