1 From the Division of Pulmonary and Critical Care, Department of Medicine (N.K.C.), and Department of Oncology and Cancer Prevention and Control Program (D.B.A.), Georgetown University Medical Center; and the Schroeder Institute for Tobacco Research and Policy Studies at Legacy (D.B.A.) - all in Washington, DC; the Department of Health, Behavior, and Society, Johns Hopkins Bloomberg School of Public Health, Baltimore (N.K.C., D.B.A.); and MeYou Health, Boston (N.K.C.).