1. Division of Research, Kaiser Permanente Northern California, Oakland
2. Division of Public Health Sciences, Fred Hutchinson Cancer Research Center, Seattle, Washington
3. Division of Hematology, Department of Internal Medicine, The Ohio State University, Columbus
4. Division of Cancer Prevention and Control, Department of Internal Medicine, The Ohio State University, Columbus
5. School of Nursing, University of Washington, Seattle
6. Department of Epidemiology, College of Public Health, The University of Iowa, Iowa City