John Leddy led the study (IMAGE) University at Buffalo Caption John Leddy and his colleagues at UB have spent years investigating how concussions impact young athletes. Credit Douglas Levere/University at Buffalo Usage Restrictions No restrictions. License Original 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.