3D-printed liver model (IMAGE) University of Oldenburg Caption Assistant doctors can train to perform a variety of surgical procedures using lifelike organ models produced with 3D printing. Credit University of Oldenburg/Michael Stephan Usage Restrictions Use only in connection with reports on the project and with appropriate credit. 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.