Salk author photo (IMAGE) Salk Institute Caption From left: Neal Amin and Samuel Pfaff Credit (L) Marito Hayashi; (R) Salk Institute Usage Restrictions with credit and related coverage 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.