Layton Smith, Ph.D. (IMAGE) Sanford Burnham Prebys Caption Layton Smith, Ph.D. Credit Sanford Burnham Prebys Medical Discovery Institute (SBP) Usage Restrictions None 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.