1. Infections and Immunoepidemiology Branch; Division of Cancer Epidemiology and Genetics; National Cancer Institute; National Institutes of Health; Bethesda; MD
2. Department of Biostatistics; Gillings School of Global Public Health; University of North Carolina; Chapel Hill; NC
3. Department of Epidemiology; Gillings School of Global Public Health; University of North Carolina; Chapel Hill; NC
4. Worldwide Epidemiology, GlaxoSmithKline; Stockley Park; United Kingdom
5. Division of Cancer Epidemiology; McGill University; Montreal; Canada