Mean Harm Scores for 20 Substances (image) University of Bristol Share Print E-Mail Caption Figure 1 from Nutt et al: Development of a rational scale to assess the harm of drugs of potential misuse. To be published in the Lancet on Friday, March 23, 2007. Credit David Nutt et al. Usage Restrictions None Share Print E-Mail 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.