1. Surveillance Research Program, Division of Cancer Control and Population Sciences, National Cancer Institute; Bethesda Maryland
2. Department of Preventive Medicine, Keck School of Medicine; University of Southern California; Los Angeles California
3. Louisiana Tumor Registry; Louisiana State University; New Orleans Louisiana
4. New Jersey State Cancer Registry, Rutgers Cancer Institute of New Jersey; New Brunswick New Jersey
5. Biometry Research Group, Division of Cancer Prevention, National Cancer Institute; Bethesda Maryland
6. Information Management Systems Incorporated; Calverton Maryland