1. Department of Epidemiology and Biostatistics; College of Public Health, University of South Florida; Tampa FL
2. Icahn School of Medicine, Mount Sinai School of Medicine; Tisch Cancer Institute; New York NY
3. Department of Chronic Disease Epidemiology; Yale School of Public Health, Yale University; New Haven CT
4. Yale Cancer Center; New Haven CT
5. Department of Cancer Epidemiology; H. Lee Moffitt Cancer Center and Research Institute; Tampa FL 33612
6. Vietnam National Cancer Hospital; Hanoi Vietnam
7. Vietnam National Institute for Cancer Control; Hanoi Vietnam
8. Division of Epidemiology, Department of Medicine; Vanderbilt Epidemiology Center, Vanderbilt-Ingram Cancer Center, Vanderbilt University School of Medicine; Nashville TN