1. Division of Pediatric Urology, Department of Urology; University of Washington, Seattle Children's Hospital; Seattle Washington
2. Applied Research Program; National Cancer Institute; Bethesda Maryland
3. Cancer Prevention Institute of California; Fremont California
4. Department of Health Research and Policy; School of Medicine, Stanford University; Stanford California
5. Department of Epidemiology; University of Iowa; Iowa City Iowa
6. Department of Pediatrics; Louisiana State University Health Sciences Center; New Orleans Louisiana
7. Department of Public Health Sciences; School of Medicine, University of California; Davis California
8. Epidemiology Program, School of Public Health; Louisiana State University Health Sciences Center; New Orleans Louisiana
9. Department of Preventive Medicine, Keck School of Medicine; University of Southern California; Los Angeles California
10. Department of Epidemiology and Biostatistics, School of Medicine; The University of Texas Health Science Center; San Antonio Texas
11. Information Management Services Inc; Silver Spring Maryland
12. Department of Epidemiology, School of Public Health; University of Washington; Seattle Washington
13. Epidemiology Program, Public Health Sciences Division; Fred Hutchinson Cancer Research Center; Seattle Washington