Dr. Shigeki Shibata (IMAGE) The Physiological Society Caption Lead author Dr. Shigeki Shibata, who developed the technique of defining the biological age of the aorta. Credit Dr. Shigeki Shibata Usage Restrictions with 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.