[1] Johns Hopkins Ciccarone Center for the Prevention of Cardiovascular Disease,Department of Medicine
[2] The American Heart Association Tobacco Regulation and Addiction Center,Russell H. Morgan Department of Radiology and Radiological Science
[3] MedStar Union Memorial Hospital 201 E University Pkwy,Department of Radiology and Neuroradiology
[4] Johns Hopkins University School of Medicine,Division of Cardiology, Department of Medicine
[5] Charité,undefined
[6] National Jewish Health,undefined