1. Infections and Cancer Epidemiology, Infection, Inflammation and Cancer ProgramGerman Cancer Research Center (DKFZ) Heidelberg Germany
2. Faculty of BiosciencesHeidelberg University Heidelberg Germany
3. National Institute for Health Research (NIHR), Bristol Biomedical Research CentreUniversity Bristol Hospitals, Bristol NHS Foundation Trust and University of Bristol Bristol UK
4. Centre for Trials Research, College of Biomedical and Life SciencesCardiff University Cardiff UK
5. Community Oral Health, University of Glasgow Dental School, College of Medical, Veterinary and Life SciencesUniversity of Glasgow Glasgow UK
6. Division of Cancer Epidemiology and GeneticsNational Cancer Institute Bethesda Maryland USA