1. Division of Research, Kaiser Permanente Northern California, Oakland, California;
2. Department of Health Systems Science, Kaiser Permanente Bernard J. Tyson School of Medicine, Pasadena, California; and
3. Department of Radiology,
4. Department of Epidemiology,
5. Lineberger Comprehensive Cancer Center, and
6. Division of Pulmonary and Critical Care Medicine, Department of Medicine, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina