1. Cancer Prevention Institute of California, Fremont, California
2. Stanford Cancer Institute, Stanford University, Stanford, California
3. Department of Health Research and Policy, School of Medicine, Stanford University, Stanford, California
4. Division of Cancer Epidemiology and Genetics, National Cancer Institute, Bethesda, Maryland
5. School of Medicine, University of Ghana, Accra, Ghana
6. James Buchanan Brady Urological Institute, Department of Pathology and Oncology, Johns Hopkins School of Medicine, Johns Hopkins University, Baltimore, Maryland
7. Department of Epidemiology, University of California-Berkeley, Berkeley, California
8. School of Medicine, University of California-Los Angeles, Los Angeles, California
9. University of Texas Health Science Center at San Antonio, San Antonio, Texas
10. Westat, Rockville, Maryland
11. International Epidemiology Institute, Rockville, Maryland