Ville Wallenius, University of Gothenburg (IMAGE) University of Gothenburg Caption This is Ville Wallenius, associate professor, senior consultant in bariatric surgery and principal author of the study. Credit Photo by University of Gothenburg 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.