Dr. Warner Greene, Gladstone Institutes (IMAGE) NIH/National Institute on Drug Abuse Caption This is Warner Greene, M.D., Ph.D., of the Gladstone Institutes, San Francisco. Credit National Institute on Drug Abuse 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.