Addiction Researchers (IMAGE) Virginia Tech Caption Warren Bickel (right), the director of the Virginia Tech Carilion Research Institute Addiction Recovery Research Center, along with VTCRI co-investigators Jeff Stein (left) and Mikhail Koffarnus, are determined to discover whether ventilated filters on cigarettes have been a boon or bane to public health. Credit David Hungate/Virginia Tech Carilion Research Institute 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.