Cyclists (IMAGE) University of Granada Caption A study led by the University of Granada (UGR) has shown that doping is not only a problem exclusive to professional sports, but also occurs in amateur sports. Credit UGRdivulga 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.