1. Division of Cancer Epidemiology and GeneticsNational Cancer Institute Rockville Maryland
2. Department of EpidemiologyUniversity of Iowa Iowa City, Iowa
3. Illinois State Cancer Registry, Illinois Department of Public Health Springfield Illinois
4. Cancer Epidemiology Services, New Jersey Department of Health Trenton New Jersey
5. California Cancer Reporting and Epidemiologic Surveillance Program, Institute for Population Health ImprovementUniversity of California at Davis Health System Sacramento California
6. North Carolina Central Cancer Registry Raleigh North Carolina