1. Division of Cancer Epidemiology and Genetics; National Cancer Institute; Rockville Maryland
2. Michigan Cancer Surveillance Program, Michigan Department of Community Health; Lansing Michigan
3. Samuel Oschin Comprehensive Cancer Institute; Cedars-Sinai Medical Center Los Angeles California
4. Utah Cancer Registry; Salt Lake City Utah
5. Department of Epidemiology; College of Public Health, The University of Iowa; Iowa City Iowa
6. New Jersey State Cancer Registry, New Jersey Department of Health; Trenton New Jersey