Kennedy and Haller (IMAGE) University of Toledo Caption Dr. David Kennedy (left) and Dr. Steven Haller recently published research that found microcystin, a toxin produced by blue-green algae, may be more dangerous than previously known for those with preexisting liver disease. Kennedy and Haller are assistant professors of medicine at The University of Toledo. Credit Daniel Miller, The University of Toledo Usage Restrictions Must credit The University of Toledo. 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.