1. American Heart Association Tobacco, Regulation and Addiction Center, University of Louisville School of Medicine, Louisville, KY
2. American Heart Association Tobacco, Regulation and Addiction Center, Vascular Biology Section, Whitaker Cardiovascular Institute, Boston University School of Medicine, Boston, MA
3. American Heart Association Tobacco, Regulation and Addiction Center, Ciccarone Center for the Prevention of Heart Disease, John Hopkins Hospital, Baltimore, MD