Salk - Belmonte - Progeria - Mice (IMAGE) Salk Institute Caption This image shows two mice of the same age with progeria. The larger and healthier mouse on the left received the gene therapy, while the mouse on the right did not. Credit Salk Institute Usage Restrictions with credit and related coverage. 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.