Geographical Variation (IMAGE) University of Warwick Caption Geographical variation in the prescribing rate of benzodiazepines and Z-drugs across England in 2017 by Clinical Commissioning Group. Credit University of Warwick Usage Restrictions Use only with credit. 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.