Gil Wolfe, University at Buffalo (IMAGE) University at Buffalo Caption 'Until this study, the only evidence was from non-randomized studies that contained significant bias issues,' said Wolfe. Credit Douglas Levere, University at Buffalo 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.