Published on in Vol 14, No 1 (2012): Jan-Feb
1 The Schroeder Institute for Tobacco Research and Policy Studies, American Legacy Foundation, Washington, DC, United States
2 Division of Pulmonary & Critical Care, Department of Medicine, Georgetown University Medical Center, Washington, DC, United States
3 Department of Oncology, Georgetown University Medical Center / Lombardi Comprehensive Cancer Center, Washington, DC, United States
4 Department of Health, Behavior and Society, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, United States
5 see acknowledgements of original article, Washington, DC, United States