Dr. Kerstin U. Ludwig (left) (IMAGE) University of Bonn Caption and Dr. Julia Welzenbach from the Institute of Human Genetics at the University Hospital Bonn. Credit © Barbara Frommann/Uni Bonn Usage Restrictions This image may be used together with the press release. 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.