1. Surveillance Research Program, Division of Cancer Control and Population Sciences; National Cancer Institute; Bethesda Maryland
2. Department of Epidemiology and Biostatistics; George Washington University Milken Institute School of Public Health; Washington DC
3. Faculty of Medicine; University of Paris Sud; Le Kremlin-Bicêtre France
4. Department of Radiation Oncology; University of Utah; Salt Lake City Utah
5. Division of Cancer Epidemiology and Genetics; National Cancer Institute; Bethesda Maryland