Enzymes in ex vivo circuit (IMAGE) University Health Network Caption Dr. Aizhou Wang demonstrates the enzymes delivery to an Ex Vivo Lung Perfusion (EVLP) system. (Credit: UHN) Credit University Health Network Usage Restrictions Please use credit "University Health Network) License Original 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.