1. Department of Epidemiology, Gillings School of Global Public HealthUniversity of North Carolina Chapel Hill NC
2. Department of Epidemiology and BiostatisticsMemorial Sloan‐Kettering Cancer Center New York NY
3. Department of Medical MicrobiologyLund University Malmö Sweden
4. Division of Cancer Epidemiology and GeneticsNational Cancer Institute, National Institutes of Health, Department of Health and Human Services Bethesda MD
5. Division of ResearchKaiser Permanente Northern California Oakland CA
6. Cancer Registry of NorwayInstitute of Population‐based Cancer Research Oslo Norway