Genetic Cause of Heart Valve Defects Discovered (image) University of Bonn Share Print E-Mail Caption This image shows Dr. Elvira Mass, Dr. Dagmar Wachten and Prof. Dr. Michael Hoch (from left). Credit (c) Photo: Volker Lannert/Uni Bonn Usage Restrictions This photo may be used with the press release. Share Print E-Mail 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.