DNA Helix (IMAGE) University of Leeds Caption Important research has shed light on the prevalence of congenital anomalies. Credit US National Institutes of Health, <a target="_blank" href="http://commons.wikimedia.org/wiki/File:DNA_Double_Helix.png">http://commons.wikimedia.org/wiki/File:DNA_Double_Helix.png</a> 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.