1. Department of EpidemiologySchool of Public Health, University of Washington Seattle Washington
2. Fred Hutchinson Cancer Research Center Seattle Washington
3. Department of Public Health and Community MedicineTufts University School of Medicine Boston Massachusetts
4. Department of EpidemiologyJohns Hopkins Bloomberg School of Public Health Baltimore Maryland
5. Department of Urology, The James Buchanan Brady Urological InstituteJohns Hopkins University School of Medicine Baltimore Maryland
6. Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins Baltimore Maryland