1. Division of Pulmonary Medicine, Thoracic Oncology Research Group, Hollings Cancer Center, Medical University of South Carolina, Charleston, South Carolina (G.A.S., N.T.T.)
2. American College of Radiology, Reston, Virginia (L.G., J.B., M.S.)
3. Department of Health Systems Science, Kaiser Permanente Bernard J. Tyson School of Medicine, Pasadena, California (M.G.)
4. Departments of Radiology and Internal Medicine, University of Michigan/Michigan Medicine, Ann Arbor, Michigan (E.A.K.)
5. Respiratory Institute, Cleveland Clinic, Cleveland, Ohio (P.J.M.)
6. Division of Pulmonary and Critical Care Medicine, University of North Carolina, Chapel Hill, Chapel Hill, North Carolina (M.P.R.)
7. Division of Cancer Control and Population Sciences, National Cancer Institute, Bethesda, Maryland (V.P.D.)
8. Cancer Prevention and Early Detection Department, American Cancer Society, Atlanta, Georgia (L.S.R., R.A.S.)
9. Intramural Research Department, American Cancer Society, Atlanta, Georgia (S.F.).