Shelby Karpman, University of Alberta (IMAGE) University of Alberta Caption Dr. Shelby Karpman lead a new University of Alberta study on injury risks of boxing versus mixed martial arts. Credit University of Alberta Usage Restrictions Attribution 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.